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This was one of my first attempts to write codes in F#. Ofcource It is not a perfect sample, but It is still useful. The console application that will be run is 'ocaml'. You can replace it with any other applications that you want. I wrote it when I was trying to learn ocaml and I wanted to save my sessions. Take a look and let me know ( and learn ) if there is any issues.Thanks.

open System
open System.Collections.Generic
open System.ComponentModel
open System.Data
open System.Drawing
open System.Text
open System.Windows.Forms
open System.IO
open System.Diagnostics
open System.Threading

type MainForm = 
	class
		inherit System.Windows.Forms.Form as base
		override this.Dispose(disposing) =
			if (disposing && (match this.components with null -> false | _ -> true)) then
				this.components.Dispose();
			base.Dispose(disposing)
		member this.InitializeComponent() =
            this.tbWorkArea <- new System.Windows.Forms.TextBox();
            this.proc <- new System.Diagnostics.Process();
            this.msMain <- new System.Windows.Forms.MenuStrip();
            this.fileToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.saveToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.openToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.exitToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.workspaceToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.fontToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.textColorToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.backgroundColorToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.sfdSave <- new System.Windows.Forms.SaveFileDialog();
            this.ofdOpen <- new System.Windows.Forms.OpenFileDialog();
            this.cdColor <- new System.Windows.Forms.ColorDialog();
            this.fdFont <- new System.Windows.Forms.FontDialog();
            this.msMain.SuspendLayout();
            this.SuspendLayout();
            // 
            // tbWorkArea
            // 
            this.tbWorkArea.Dock <- System.Windows.Forms.DockStyle.Fill;
            this.tbWorkArea.Font <- new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, Convert.ToByte(0));
            this.tbWorkArea.Location <- new System.Drawing.Point(0, 24);
            this.tbWorkArea.Multiline <- true;
            this.tbWorkArea.Name <- "tbWorkArea";
            this.tbWorkArea.Size <- new System.Drawing.Size(566, 377);
            this.tbWorkArea.TabIndex <- 0;
            this.tbWorkArea.WordWrap <- false;
            this.tbWorkArea.add_KeyUp(fun (sender : Object) (e : KeyEventArgs) -> this.tbWorkArea_KeyUp sender e);
            // 
            // proc
            // 
            this.proc.StartInfo.Domain <- "";
            this.proc.StartInfo.LoadUserProfile <- false;
            this.proc.StartInfo.Password <- null;
            // this.proc.StartInfo.StandardErrorEncoding <- null;
            // this.proc.StartInfo.StandardOutputEncoding <- null;
            this.proc.StartInfo.UserName <- "";
            this.proc.SynchronizingObject <- this;
            // 
            // msMain
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.msMain.Items.AddRange([| (this.fileToolStripMenuItem :> System.Windows.Forms.ToolStripItem) ; (this.workspaceToolStripMenuItem :> System.Windows.Forms.ToolStripItem) |]);
            this.msMain.Location <- new System.Drawing.Point(0, 0);
            this.msMain.Name <- "msMain";
            this.msMain.Size <- new System.Drawing.Size(566, 24);
            this.msMain.TabIndex <- 1;
            this.msMain.Text <- "menu";
            // 
            // fileToolStripMenuItem
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.fileToolStripMenuItem.DropDownItems.AddRange([|(this.saveToolStripMenuItem:>System.Windows.Forms.ToolStripItem); (this.openToolStripMenuItem:>System.Windows.Forms.ToolStripItem); (this.exitToolStripMenuItem:>System.Windows.Forms.ToolStripItem)|]);
            this.fileToolStripMenuItem.Name <- "fileToolStripMenuItem";
            this.fileToolStripMenuItem.Size <- new System.Drawing.Size(35, 20);
            this.fileToolStripMenuItem.Text <- "&File";
            // 
            // saveToolStripMenuItem
            // 
            this.saveToolStripMenuItem.Name <- "saveToolStripMenuItem";
            this.saveToolStripMenuItem.ShortcutKeys <- unbox(box(unbox(box(System.Windows.Forms.Keys.Control)) lor unbox(box(System.Windows.Forms.Keys.S))));
            // this.saveToolStripMenuItem.ShortcutKeys <- (unbox(box(131072 lor 83)));
            this.saveToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.saveToolStripMenuItem.Text <- "&Save";
            this.saveToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.saveToolStripMenuItem_Click sender e);
            // 
            // openToolStripMenuItem
            // 
            this.openToolStripMenuItem.Name <- "openToolStripMenuItem";
            this.openToolStripMenuItem.ShortcutKeys <- unbox(box(unbox(box(System.Windows.Forms.Keys.Control)) lor unbox(box(System.Windows.Forms.Keys.O))));
            this.openToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.openToolStripMenuItem.Text <- "&Open";
            this.openToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.openToolStripMenuItem_Click sender e);
            // 
            // exitToolStripMenuItem
            // 
            this.exitToolStripMenuItem.Name <- "exitToolStripMenuItem";
            this.exitToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.exitToolStripMenuItem.Text <- "E&xit";
            this.exitToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.exitToolStripMenuItem_Click sender e);
            // 
            // workspaceToolStripMenuItem
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.workspaceToolStripMenuItem.DropDownItems.AddRange([|
				(this.fontToolStripMenuItem:>System.Windows.Forms.ToolStripItem);
				(this.textColorToolStripMenuItem:>System.Windows.Forms.ToolStripItem);
				(this.backgroundColorToolStripMenuItem:>System.Windows.Forms.ToolStripItem)|]);
            this.workspaceToolStripMenuItem.Name <- "workspaceToolStripMenuItem";
            this.workspaceToolStripMenuItem.Size <- new System.Drawing.Size(72, 20);
            this.workspaceToolStripMenuItem.Text <- "&Workspace";
            // 
            // fontToolStripMenuItem
            // 
            this.fontToolStripMenuItem.Name <- "fontToolStripMenuItem";
            this.fontToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.fontToolStripMenuItem.Text <- "F&ont";
            this.fontToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.fontToolStripMenuItem_Click sender e);
            // 
            // textColorToolStripMenuItem
            // 
            this.textColorToolStripMenuItem.Name <- "textColorToolStripMenuItem";
            this.textColorToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.textColorToolStripMenuItem.Text <- "&Text Color";
            this.textColorToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.textColorToolStripMenuItem_Click sender e);
            // 
            // backgroundColorToolStripMenuItem
            // 
            this.backgroundColorToolStripMenuItem.Name <- "backgroundColorToolStripMenuItem";
            this.backgroundColorToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.backgroundColorToolStripMenuItem.Text <- "&Background Color";
            this.backgroundColorToolStripMenuItem.add_Click(fun (sender : Object) (e : EventArgs) -> this.backgroundColorToolStripMenuItem_Click sender e);
            // 
            // sfdSave
            // 
            this.sfdSave.CheckFileExists <- true;
            this.sfdSave.add_FileOk(fun (sender : Object) (e : CancelEventArgs) -> this.sfdSave_FileOk sender e);
            // 
            // ofdOpen
            // 
            this.ofdOpen.FileName <- "openFileDialog1";
            this.ofdOpen.add_FileOk(fun (sender : Object) (e : CancelEventArgs) -> this.ofdOpen_FileOk sender e);
            // 
            // MainForm
            // 
            this.AutoScaleDimensions <- new System.Drawing.SizeF(Convert.ToSingle(6), Convert.ToSingle(13));
            this.AutoScaleMode <- System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize <- new System.Drawing.Size(566, 401);
            this.Controls.Add(this.tbWorkArea);
            this.Controls.Add(this.msMain);
            this.MainMenuStrip <- this.msMain;
            this.Name <- "MainForm";
            this.Text <- "MainForm";
            this.add_FormClosing(fun (sender : Object) (e : FormClosingEventArgs) -> this.MainForm_FormClosing sender e);
            this.msMain.ResumeLayout(false);
            this.msMain.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();
		val mutable tbWorkArea : System.Windows.Forms.TextBox;
        val mutable proc : System.Diagnostics.Process;
        val mutable msMain : System.Windows.Forms.MenuStrip;
        val mutable fileToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable saveToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable exitToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable openToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable sfdSave : System.Windows.Forms.SaveFileDialog;
        val mutable ofdOpen : System.Windows.Forms.OpenFileDialog;
        val mutable workspaceToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable textColorToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable backgroundColorToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable cdColor : System.Windows.Forms.ColorDialog;
        val mutable fontToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable fdFont :  System.Windows.Forms.FontDialog;
        val mutable bookmark : System.Int32;
        val mutable components: System.ComponentModel.Container;
        val mutable writer : System.Threading.Thread;
        val mutable reader : System.Threading.Thread;
        val mutable err_reader : System.Threading.Thread;
        val mutable stop : System.Threading.ManualResetEvent;
        member this.tbWorkArea_KeyUp (sender : Object) (e : KeyEventArgs) =
            if (e.KeyData = Keys.Enter) then 
				let mutable toWrite = "" 
				in
				begin
	                if (this.bookmark < this.tbWorkArea.Text.Length) then
		                toWrite <- this.tbWorkArea.Text.Substring(this.bookmark);
						this.proc.StandardInput.Write(toWrite);
				    if (this.bookmark >= this.tbWorkArea.Text.Length) then
					    this.bookmark <- this.tbWorkArea.Text.Length;
				end
		member this.saveToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
			let _ = this.sfdSave.ShowDialog() in ()
		member this.openToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
            let _ = this.ofdOpen.ShowDialog() in ()
		member this.exitToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
            this.Close()
		member this.fontToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
            if (this.fdFont.ShowDialog() = DialogResult.OK) then this.tbWorkArea.Font <- this.fdFont.Font
		member this.textColorToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
            if (this.cdColor.ShowDialog() = DialogResult.OK) then this.tbWorkArea.ForeColor <- this.cdColor.Color
		member this.backgroundColorToolStripMenuItem_Click (sender:Object) (e:EventArgs) =
            if (this.cdColor.ShowDialog() = DialogResult.OK) then this.tbWorkArea.BackColor <- this.cdColor.Color
		member this.sfdSave_FileOk (sender:Object) (e:CancelEventArgs) =
            let sw = new StreamWriter(this.sfdSave.FileName)
            in
                sw.Write(this.tbWorkArea.Text);
                sw.Close();
                sw.Dispose()
		member this.ofdOpen_FileOk (sender:Object) (e:CancelEventArgs) =
            let mutable cod = ""
            in
	            let sr = new StreamReader(this.ofdOpen.FileName)
		        in
			        cod <- sr.ReadToEnd();
					sr.Close();
				this.tbWorkArea.AppendText(cod)
		member this.MainForm_FormClosing (sender:Object) (e:FormClosingEventArgs) =
            this.DoOnExit()
        member this.DoOnStart() =
            let psi = new ProcessStartInfo()
            in
				this.tbWorkArea.ForeColor <- Color.FromArgb(255, 0, 0, 160);
				this.tbWorkArea.BackColor <- Color.FromArgb(255, 192, 192, 192);
	            psi.FileName <- "ocaml";
		        psi.CreateNoWindow <- true;
	            psi.RedirectStandardError <- true; //This was the cause that some responses could not be seen.
		        psi.RedirectStandardInput <- true;
			    psi.RedirectStandardOutput <- true;
				psi.UseShellExecute <- false;
	            this.proc.StartInfo <- psi;
				let _ = this.proc.Start(); in ();
				this.stop <- new ManualResetEvent(false);
				this.reader <- new Thread(new ThreadStart(fun x -> this.readerMtd()));
				this.writer <- new Thread(new ThreadStart(fun x -> this.writerMtd()));
				this.err_reader <- new Thread(new ThreadStart(fun x -> this.err_readerMtd()));
				this.reader.Start();
				this.writer.Start();
				this.err_reader.Start()
        member this.readerMtd() =
            let MAX_BUF = 4096
            in
				let mutable lbuffer = Array.create MAX_BUF '0' //char[]
				in
					let mutable bread = 0
					in
						while not (this.stop.WaitOne(1, true)) do
			                try
			                    lbuffer <- Array.create MAX_BUF '0';
			                    bread <- this.proc.StandardOutput.Read(lbuffer, 0, MAX_BUF);
			                    while (bread > 0) do
			                        this.AppendText(new string(lbuffer, 0, bread));
						            lbuffer <- Array.create MAX_BUF '0';
									bread <- this.proc.StandardOutput.Read(lbuffer, 0, MAX_BUF);
								done;
			                with
								| :?NullReferenceException -> ();
								| _ -> ();
						done;
        member this.err_readerMtd() =
            let MAX_BUF = 4096
            in
				let mutable lbuffer = Array.create MAX_BUF '0'
				in
					let mutable bread = 0
					in
			            while not (this.stop.WaitOne(1, true)) do
			                try
			                    lbuffer <- Array.create MAX_BUF '0';
						        bread <- this.proc.StandardError.Read(lbuffer, 0, MAX_BUF);
			                    while (bread > 0) do
			                        this.AppendText(new string(lbuffer, 0, bread));
						            lbuffer <- Array.create MAX_BUF '0';
									bread <- this.proc.StandardError.Read(lbuffer, 0, MAX_BUF);
								done;
			                with
								| :?NullReferenceException -> ();
								| _ -> ();
						done;
        member this.writerMtd() =
			()
		new () as this = 
			{tbWorkArea = null;
			proc = null;
			msMain = null;
			fileToolStripMenuItem = null;
			saveToolStripMenuItem = null;
			exitToolStripMenuItem = null;
			openToolStripMenuItem = null;
			sfdSave = null;
			ofdOpen = null;
			workspaceToolStripMenuItem = null;
			textColorToolStripMenuItem = null;
			backgroundColorToolStripMenuItem = null;
			cdColor = null;
			fontToolStripMenuItem = null;
			fdFont = null;
			bookmark = 0;
			components = null;
			writer = null;
			reader = null;
			err_reader = null;
			stop = null;}
		then
			this.InitializeComponent();
			this.sfdSave.Filter <- "ML files (*.ml)|*.ml|MLI files (*.mli)|*.mli|All Files (*.*)|*.*";
			this.ofdOpen.Filter <- "ML files (*.ml)|*.ml|MLI files (*.mli)|*.mli|All Files (*.*)|*.*";
			this.DoOnStart();
        member this.AppendText(text) = 
			let fd = new Converter<_,_>(fun latext -> this.AppendText(latext))
			in
				if (this.tbWorkArea.InvokeRequired) then 
					let _ = this.Invoke(fd, [|box(text)|]); in ();
				else 
					this.tbWorkArea.AppendText(text);
				this.bookmark <- this.tbWorkArea.Text.Length;
		member this.DoOnExit() = 
            let _ = this.stop.Set();
            in ();
            begin
				try
					this.proc.StandardError.Close();
				with
					| _ -> ();
			end;
			begin
				try
					this.proc.StandardInput.Close();
				with
					| _ -> ();
			end;
			begin
				try
					this.proc.StandardOutput.Close();
				with
					| _ -> ();
			end;
			begin
				try
					if not (this.proc.WaitForExit(200)) then
						this.proc.Kill();
					this.proc.Close();
				with
					| _ -> ();
			end;
			begin
				try
					if not (this.reader.Join(200)) then 
						this.reader.Abort();
				with
					| _ -> ();
			end;
			begin
				try
					if not (this.err_reader.Join(200)) then
						this.err_reader.Abort();
				with
					| _ -> ();
			end;
			begin
				try
					if not (this.writer.Join(200)) then
						this.writer.Abort();
				with
					| _ -> ();
			end;
	end

[<stathread>]
let main() = 
	Application.EnableVisualStyles();
	Application.SetCompatibleTextRenderingDefault(false);
	Thread.Sleep(400);
	Application.Run(new MainForm());

[<stathread>]
do main()

Nice!

FWIW, it looks like the TABS got a bit messed up on pasting - in general don't paste directly from VS 2005, but rather from emacs or notepad and use the "F#" button on the editing toolbar. (You may have to be logged in to get access to that - I'm not sure if that's still the case)

Here's a version of the code using more standard F# formatting, including the #light syntax. I've also made a few other modifications, e.g. the use of .Add to wire up event handlers, and the use of "|> ignore". Also I'm not sure it's necessary to create a new buffer each time around the reading loops.

 

#light

open System
open System.Collections.Generic
open System.ComponentModel
open System.Data
open System.Drawing
open System.Text
open System.Windows.Forms
open System.IO
open System.Diagnostics
open System.Threading

type MainForm = 
    class
        inherit System.Windows.Forms.Form as base
        override this.Dispose(disposing) =
            if (disposing && (match this.components with null -> false | _ -> true)) then
                this.components.Dispose();
            base.Dispose(disposing)
        member this.InitializeComponent() =
            this.tbWorkArea <- new System.Windows.Forms.TextBox();
            this.proc <- new System.Diagnostics.Process();
            this.msMain <- new System.Windows.Forms.MenuStrip();
            this.fileToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.saveToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.openToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.exitToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.workspaceToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.fontToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.textColorToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.backgroundColorToolStripMenuItem <- new System.Windows.Forms.ToolStripMenuItem();
            this.sfdSave <- new System.Windows.Forms.SaveFileDialog();
            this.ofdOpen <- new System.Windows.Forms.OpenFileDialog();
            this.cdColor <- new System.Windows.Forms.ColorDialog();
            this.fdFont <- new System.Windows.Forms.FontDialog();
            this.msMain.SuspendLayout();
            this.SuspendLayout();
            // 
            // tbWorkArea
            // 
            this.tbWorkArea.Dock <- System.Windows.Forms.DockStyle.Fill;
            this.tbWorkArea.Font <- new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, Convert.ToByte(0));
            this.tbWorkArea.Location <- new System.Drawing.Point(0, 24);
            this.tbWorkArea.Multiline <- true;
            this.tbWorkArea.Name <- "tbWorkArea";
            this.tbWorkArea.Size <- new System.Drawing.Size(566, 377);
            this.tbWorkArea.TabIndex <- 0;
            this.tbWorkArea.WordWrap <- false;
            this.tbWorkArea.KeyUp.Add(fun e -> this.tbWorkArea_KeyUp e);
            // 
            // proc
            // 
            this.proc.StartInfo.Domain <- "";
            this.proc.StartInfo.LoadUserProfile <- false;
            this.proc.StartInfo.Password <- null;
            // this.proc.StartInfo.StandardErrorEncoding <- null;
            // this.proc.StartInfo.StandardOutputEncoding <- null;
            this.proc.StartInfo.UserName <- "";
            this.proc.SynchronizingObject <- this;
            // 
            // msMain
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.msMain.Items.AddRange([| (this.fileToolStripMenuItem :> System.Windows.Forms.ToolStripItem) ; (this.workspaceToolStripMenuItem :> System.Windows.Forms.ToolStripItem) |]);
            this.msMain.Location <- new System.Drawing.Point(0, 0);
            this.msMain.Name <- "msMain";
            this.msMain.Size <- new System.Drawing.Size(566, 24);
            this.msMain.TabIndex <- 1;
            this.msMain.Text <- "menu";
            // 
            // fileToolStripMenuItem
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.fileToolStripMenuItem.DropDownItems.AddRange([|(this.saveToolStripMenuItem:>System.Windows.Forms.ToolStripItem); (this.openToolStripMenuItem:>System.Windows.Forms.ToolStripItem); (this.exitToolStripMenuItem:>System.Windows.Forms.ToolStripItem)|]);
            this.fileToolStripMenuItem.Name <- "fileToolStripMenuItem";
            this.fileToolStripMenuItem.Size <- new System.Drawing.Size(35, 20);
            this.fileToolStripMenuItem.Text <- "&File";
            // 
            // saveToolStripMenuItem
            // 
            this.saveToolStripMenuItem.Name <- "saveToolStripMenuItem";
            this.saveToolStripMenuItem.ShortcutKeys <- unbox(box(unbox(box(System.Windows.Forms.Keys.Control)) lor unbox(box(System.Windows.Forms.Keys.S))));
            // this.saveToolStripMenuItem.ShortcutKeys <- (unbox(box(131072 lor 83)));
            this.saveToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.saveToolStripMenuItem.Text <- "&Save";
            this.saveToolStripMenuItem.Click.Add(fun e -> this.saveToolStripMenuItem_Click e);
            // 
            // openToolStripMenuItem
            // 
            this.openToolStripMenuItem.Name <- "openToolStripMenuItem";
            this.openToolStripMenuItem.ShortcutKeys <- unbox(box(unbox(box(System.Windows.Forms.Keys.Control)) lor unbox(box(System.Windows.Forms.Keys.O))));
            this.openToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.openToolStripMenuItem.Text <- "&Open";
            this.openToolStripMenuItem.Click.Add(fun e -> this.openToolStripMenuItem_Click e);
            // 
            // exitToolStripMenuItem
            // 
            this.exitToolStripMenuItem.Name <- "exitToolStripMenuItem";
            this.exitToolStripMenuItem.Size <- new System.Drawing.Size(140, 22);
            this.exitToolStripMenuItem.Text <- "E&xit";
            this.exitToolStripMenuItem.Click.Add(fun e -> this.exitToolStripMenuItem_Click e);
            // 
            // workspaceToolStripMenuItem
            // 
            // new System.Windows.Forms.ToolStripItem[]
            this.workspaceToolStripMenuItem.DropDownItems.AddRange
                ([| (this.fontToolStripMenuItem:>System.Windows.Forms.ToolStripItem);
                    (this.textColorToolStripMenuItem:>System.Windows.Forms.ToolStripItem);
                    (this.backgroundColorToolStripMenuItem:>System.Windows.Forms.ToolStripItem)|]);
            this.workspaceToolStripMenuItem.Name <- "workspaceToolStripMenuItem";
            this.workspaceToolStripMenuItem.Size <- new System.Drawing.Size(72, 20);
            this.workspaceToolStripMenuItem.Text <- "&Workspace";
            // 
            // fontToolStripMenuItem
            // 
            this.fontToolStripMenuItem.Name <- "fontToolStripMenuItem";
            this.fontToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.fontToolStripMenuItem.Text <- "F&ont";
            this.fontToolStripMenuItem.Click.Add(fun e -> this.fontToolStripMenuItem_Click e);
            // 
            // textColorToolStripMenuItem
            // 
            this.textColorToolStripMenuItem.Name <- "textColorToolStripMenuItem";
            this.textColorToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.textColorToolStripMenuItem.Text <- "&Text Color";
            this.textColorToolStripMenuItem.Click.Add(fun e -> this.textColorToolStripMenuItem_Click e);
            // 
            // backgroundColorToolStripMenuItem
            // 
            this.backgroundColorToolStripMenuItem.Name <- "backgroundColorToolStripMenuItem";
            this.backgroundColorToolStripMenuItem.Size <- new System.Drawing.Size(158, 22);
            this.backgroundColorToolStripMenuItem.Text <- "&Background Color";
            this.backgroundColorToolStripMenuItem.Click.Add(fun e -> this.backgroundColorToolStripMenuItem_Click e);
            // 
            // sfdSave
            // 
            this.sfdSave.CheckFileExists <- true;
            this.sfdSave.FileOk.Add(fun e -> this.sfdSave_FileOk e);
            // 
            // ofdOpen
            // 
            this.ofdOpen.FileName <- "openFileDialog1";
            this.ofdOpen.FileOk.Add(fun e -> this.ofdOpen_FileOk e);
            // 
            // MainForm
            // 
            this.AutoScaleDimensions <- new System.Drawing.SizeF(Convert.ToSingle(6), Convert.ToSingle(13));
            this.AutoScaleMode <- System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize <- new System.Drawing.Size(566, 401);
            this.Controls.Add(this.tbWorkArea);
            this.Controls.Add(this.msMain);
            this.MainMenuStrip <- this.msMain;
            this.Name <- "MainForm";
            this.Text <- "MainForm";
            this.FormClosing.Add(fun e -> this.MainForm_FormClosing e);
            this.msMain.ResumeLayout(false);
            this.msMain.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();
        val mutable tbWorkArea : System.Windows.Forms.TextBox;
        val mutable proc : System.Diagnostics.Process;
        val mutable msMain : System.Windows.Forms.MenuStrip;
        val mutable fileToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable saveToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable exitToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable openToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable sfdSave : System.Windows.Forms.SaveFileDialog;
        val mutable ofdOpen : System.Windows.Forms.OpenFileDialog;
        val mutable workspaceToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable textColorToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable backgroundColorToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable cdColor : System.Windows.Forms.ColorDialog;
        val mutable fontToolStripMenuItem : System.Windows.Forms.ToolStripMenuItem;
        val mutable fdFont :  System.Windows.Forms.FontDialog;
        val mutable bookmark : System.Int32;
        val mutable components: System.ComponentModel.Container;
        val mutable writer : System.Threading.Thread;
        val mutable reader : System.Threading.Thread;
        val mutable err_reader : System.Threading.Thread;
        val mutable stop : System.Threading.ManualResetEvent;
        member this.tbWorkArea_KeyUp (e : KeyEventArgs) =
            if (e.KeyData = Keys.Enter) then 
                let mutable toWrite = "" 
                
                if (this.bookmark < this.tbWorkArea.Text.Length) then
                        toWrite <- this.tbWorkArea.Text.Substring(this.bookmark);
                                        this.proc.StandardInput.Write(toWrite);
                            if (this.bookmark >= this.tbWorkArea.Text.Length) then
                                    this.bookmark <- this.tbWorkArea.Text.Length;
        member this.saveToolStripMenuItem_Click (e:EventArgs) =
            this.sfdSave.ShowDialog() |> ignore
        member this.openToolStripMenuItem_Click (e:EventArgs) =
            this.ofdOpen.ShowDialog() |> ignore
        member this.exitToolStripMenuItem_Click (e:EventArgs) =
            this.Close()
        member this.fontToolStripMenuItem_Click (e:EventArgs) =
            if (this.fdFont.ShowDialog() = DialogResult.OK) then this.tbWorkArea.Font <- this.fdFont.Font
        member this.textColorToolStripMenuItem_Click (e:EventArgs) =
            if (this.cdColor.ShowDialog() = DialogResult.OK) then this.tbWorkArea.ForeColor <- this.cdColor.Color
        member this.backgroundColorToolStripMenuItem_Click (e:EventArgs) =
            if (this.cdColor.ShowDialog() = DialogResult.OK) then this.tbWorkArea.BackColor <- this.cdColor.Color
        member this.sfdSave_FileOk (e:CancelEventArgs) =
            let sw = new StreamWriter(this.sfdSave.FileName)
            sw.Write(this.tbWorkArea.Text);
            sw.Close();
            sw.Dispose()
        member this.ofdOpen_FileOk (e:CancelEventArgs) =
            let sr = new StreamReader(this.ofdOpen.FileName)
            let cod = sr.ReadToEnd()
            sr.Close();
            this.tbWorkArea.AppendText(cod)
        member this.MainForm_FormClosing (e:FormClosingEventArgs) =
            this.DoOnExit()
        member this.DoOnStart() =
            let psi = new ProcessStartInfo()
            this.tbWorkArea.ForeColor <- Color.FromArgb(255, 0, 0, 160);
            this.tbWorkArea.BackColor <- Color.FromArgb(255, 192, 192, 192);
            psi.FileName <- "ocaml";
            psi.CreateNoWindow <- true;
            psi.RedirectStandardError <- true; //This was the cause that some responses could not be seen.
            psi.RedirectStandardInput <- true;
            psi.RedirectStandardOutput <- true;
            psi.UseShellExecute <- false;
            this.proc.StartInfo <- psi;
            this.proc.Start(); |> ignore;
            this.stop <- new ManualResetEvent(false);
            this.reader <- new Thread(new ThreadStart(fun x -> this.readerMtd()));
            this.writer <- new Thread(new ThreadStart(fun x -> this.writerMtd()));
            this.err_reader <- new Thread(new ThreadStart(fun x -> this.err_readerMtd()));
            this.reader.Start();
            this.writer.Start();
            this.err_reader.Start()
        member this.readerMtd() =
            let MAX_BUF = 4096
            let lbuffer = Array.create MAX_BUF '0' //char[]
            let mutable bread = 0
            while not (this.stop.WaitOne(1, true)) do
                try
                    bread <- this.proc.StandardOutput.Read(lbuffer, 0, MAX_BUF);
                    while (bread > 0) do
                        this.AppendText(new string(lbuffer, 0, bread));
                        bread <- this.proc.StandardOutput.Read(lbuffer, 0, MAX_BUF);
                    done;
                with
                | :?NullReferenceException -> ();
                | _ -> ();
            done;
        member this.err_readerMtd() =
            let MAX_BUF = 4096
            let lbuffer = Array.create MAX_BUF '0'
            let mutable bread = 0
            while not (this.stop.WaitOne(1, true)) do
                try
                    bread <- this.proc.StandardError.Read(lbuffer, 0, MAX_BUF);
                    while (bread > 0) do
                        this.AppendText(new string(lbuffer, 0, bread));
                        bread <- this.proc.StandardError.Read(lbuffer, 0, MAX_BUF);
                    done;
                with
                | :? NullReferenceException -> ();
                | _ -> ();
            done;
        member this.writerMtd() = ()
        new () as this = 
                { tbWorkArea = null;
                  proc = null;
                  msMain = null;
                  fileToolStripMenuItem = null;
                  saveToolStripMenuItem = null;
                  exitToolStripMenuItem = null;
                  openToolStripMenuItem = null;
                  sfdSave = null;
                  ofdOpen = null;
                  workspaceToolStripMenuItem = null;
                  textColorToolStripMenuItem = null;
                  backgroundColorToolStripMenuItem = null;
                  cdColor = null;
                  fontToolStripMenuItem = null;
                  fdFont = null;
                  bookmark = 0;
                  components = null;
                  writer = null;
                  reader = null;
                  err_reader = null;
                  stop = null;}
            then
                this.InitializeComponent();
                this.sfdSave.Filter <- "ML files (*.ml)|*.ml|MLI files (*.mli)|*.mli|All Files (*.*)|*.*";
                this.ofdOpen.Filter <- "ML files (*.ml)|*.ml|MLI files (*.mli)|*.mli|All Files (*.*)|*.*";
                this.DoOnStart();
        member this.AppendText(text) = 
            let fd = new Converter<_,_>(fun latext -> this.AppendText(latext))
            if (this.tbWorkArea.InvokeRequired) then 
                this.Invoke(fd, [|box(text)|]) |> ignore
            else 
                this.tbWorkArea.AppendText(text)
            this.bookmark <- this.tbWorkArea.Text.Length;
        member this.DoOnExit() = 
            this.stop.Set() |> ignore
            try
                    this.proc.StandardError.Close();
            with
                    | _ -> ();
            try
                    this.proc.StandardInput.Close();
            with
                    | _ -> ();
            try
                    this.proc.StandardOutput.Close();
            with
                    | _ -> ();
            try
                    if not (this.proc.WaitForExit(200)) then
                            this.proc.Kill();
                    this.proc.Close();
            with
                    | _ -> ();
            try
                    if not (this.reader.Join(200)) then 
                            this.reader.Abort();
            with
                    | _ -> ();
            try
                    if not (this.err_reader.Join(200)) then
                            this.err_reader.Abort();
            with
                    | _ -> ();
            try
                    if not (this.writer.Join(200)) then
                            this.writer.Abort();
            with
                    | _ -> ();
    end

[<STAThread>]
let main() = 
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Thread.Sleep(400);
        Application.Run(new MainForm());

[<STAThread>]
do main()

By dsyme on 10/9/2006 3:16 AM (permalink)

Thank you for a very educational, great sample. I've taken the liberty to revamp it a little. Specifically, I changed the following:

Fixed the clean-up code in DoOnExit: the exception patterns bind more tightly than sequencing, so unless an exception is thrown, latter code doesn't get executed. I've used a higher-order function, swallow, with a form reminiscent of ignore.
Added detection of process exiting to close the form.
Abstracted the reading code for stdin and stdout into a common, ThreadStart-returning method.
Used Enum.Combine to simplify adding accelerator keys to menu items.
Used Idioms.using around some IDisposable acquisitions.
Re-formatted the code a little to make it a bit more idiomatic F#/ML.

I've found the code instructive, and I wanted to share what I've learned. Thank you.

open System
open System.Collections.Generic
open System.ComponentModel
open System.Data
open System.Drawing
open System.Text
open System.Windows.Forms
open System.IO
open System.Diagnostics
open System.Threading

let ml_pattern_filter = "ML files (*.ml)|*.ml|MLI files (*.mli)|*.mli|All Files (*.*)|*.*"
let swallow (thunk : unit -> unit) =
    try thunk () with _ -> ()
type MainForm =
    class
        inherit System.Windows.Forms.Form as base
 
        val mutable tbWorkArea : System.Windows.Forms.TextBox
        val mutable proc : System.Diagnostics.Process
        val mutable msMain : System.Windows.Forms.MenuStrip
        val mutable miFile : System.Windows.Forms.ToolStripMenuItem
        val mutable miSave : System.Windows.Forms.ToolStripMenuItem
        val mutable miOpen : System.Windows.Forms.ToolStripMenuItem
        val mutable miExit : System.Windows.Forms.ToolStripMenuItem
        val mutable miWorkspace : System.Windows.Forms.ToolStripMenuItem
        val mutable miFont : System.Windows.Forms.ToolStripMenuItem
        val mutable miTextColor : System.Windows.Forms.ToolStripMenuItem
        val mutable miBackColor : System.Windows.Forms.ToolStripMenuItem
        val mutable sfdSave : System.Windows.Forms.SaveFileDialog
        val mutable ofdOpen : System.Windows.Forms.OpenFileDialog
        val mutable cdColor : System.Windows.Forms.ColorDialog
        val mutable fdFont :  System.Windows.Forms.FontDialog
        
        val mutable bookmark : System.Int32
        val mutable stdoutReader : System.Threading.Thread
        val mutable stderrReader : System.Threading.Thread
        val mutable stopSignal : System.Threading.ManualResetEvent
        
        val mutable components: System.ComponentModel.Container 
          new () as this =
                { tbWorkArea = null;
                  proc = null;
                  msMain = null;
                  miFile = null;
                  miSave = null;
                  miExit = null;
                  miOpen = null;
                  sfdSave = null;
                  ofdOpen = null;
                  miWorkspace = null;
                  miTextColor = null;
                  miBackColor = null;
                  cdColor = null;
                  miFont = null;
                  fdFont = null;
                  bookmark = 0;
                  components = null;
                  stdoutReader = null;
                  stderrReader = null;
                  stopSignal = null; }
            then
                this.InitializeComponent ();
                this.DoOnStart ()
        
        override this.Dispose disposing =
            if disposing && this.components <> null then
                this.components.Dispose ();
            base.Dispose disposing
        
        member this.InitializeComponent () =
            this.tbWorkArea <- new System.Windows.Forms.TextBox ();
            this.proc <- new System.Diagnostics.Process ();
            this.msMain <- new System.Windows.Forms.MenuStrip ();
            this.miFile <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miSave <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miOpen <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miExit <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miWorkspace <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miFont <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miTextColor <- new System.Windows.Forms.ToolStripMenuItem ();
            this.miBackColor <- new System.Windows.Forms.ToolStripMenuItem ();
            this.sfdSave <- new System.Windows.Forms.SaveFileDialog ();
            this.ofdOpen <- new System.Windows.Forms.OpenFileDialog ();
            this.cdColor <- new System.Windows.Forms.ColorDialog ();
            this.fdFont <- new System.Windows.Forms.FontDialog ();
            this.msMain.SuspendLayout ();
            this.SuspendLayout ();
            //
            // tbWorkArea
            //
            this.tbWorkArea.Dock <- System.Windows.Forms.DockStyle.Fill;
            this.tbWorkArea.Font <- new System.Drawing.Font ("Courier New", 8.F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, Convert.ToByte 0);
            this.tbWorkArea.Location <- new System.Drawing.Point (0, 24);
            this.tbWorkArea.Multiline <- true;
            this.tbWorkArea.ScrollBars <- System.Windows.Forms.ScrollBars.Vertical;
            this.tbWorkArea.Name <- "tbWorkArea";
            this.tbWorkArea.Size <- new System.Drawing.Size (566, 377);
            this.tbWorkArea.ForeColor <- Color.FromArgb (255, 0, 0, 0);
            this.tbWorkArea.BackColor <- Color.FromArgb (255, 255, 255, 255);
            this.tbWorkArea.TabIndex <- 0;
            this.tbWorkArea.WordWrap <- false;
            this.tbWorkArea.KeyUp.Add (fun e -> this.tbWorkArea_KeyUp e);
            //
            // proc
            //
            this.proc.StartInfo.UseShellExecute <- false;
            this.proc.StartInfo.CreateNoWindow <- true;
            this.proc.StartInfo.RedirectStandardInput <- true;
            this.proc.StartInfo.RedirectStandardOutput <- true;
            this.proc.StartInfo.RedirectStandardError <- true;
            this.proc.StartInfo.Domain <- "";
            this.proc.StartInfo.LoadUserProfile <- false;
            this.proc.StartInfo.UserName <- "";
            this.proc.StartInfo.Password <- null;
            this.proc.SynchronizingObject <- this;
            //
            // msMain
            //
            this.msMain.Items.AddRange [|
                (this.miFile :> System.Windows.Forms.ToolStripItem);
                (this.miWorkspace :> System.Windows.Forms.ToolStripItem);
            |];
            this.msMain.Location <- new System.Drawing.Point (0, 0);
            this.msMain.Name <- "msMain";
            this.msMain.Size <- new System.Drawing.Size (566, 24);
            this.msMain.TabIndex <- 1;
            this.msMain.Text <- "menu";
            //
            // miFile
            //
            this.miFile.DropDownItems.AddRange [|
                (this.miSave :> System.Windows.Forms.ToolStripItem);
                (this.miOpen :> System.Windows.Forms.ToolStripItem);
                (this.miExit :> System.Windows.Forms.ToolStripItem)
            |];
            this.miFile.Name <- "miFile";
            this.miFile.Size <- new System.Drawing.Size (35, 20);
            this.miFile.Text <- "&File";
            //
            // miSave
            //
            this.miSave.Name <- "miSave";
            this.miSave.ShortcutKeys <- Enum.combine [System.Windows.Forms.Keys.Control; System.Windows.Forms.Keys.S];
            this.miSave.Size <- new System.Drawing.Size (140, 22);
            this.miSave.Text <- "&Save";
            this.miSave.Click.Add (fun e -> this.miSave_Click e);
            //
            // miOpen
            //
            this.miOpen.Name <- "miOpen";
            this.miOpen.ShortcutKeys <- Enum.combine [System.Windows.Forms.Keys.Control; System.Windows.Forms.Keys.O];
            this.miOpen.Size <- new System.Drawing.Size (140, 22);
            this.miOpen.Text <- "&Open";
            this.miOpen.Click.Add (fun e -> this.miOpen_Click e);
            //
            // miExit
            //
            this.miExit.Name <- "miExit";
            this.miExit.Size <- new System.Drawing.Size (140, 22);
            this.miExit.Text <- "E&xit";
            this.miExit.Click.Add (fun e -> this.miExit_Click e);
            //
            // miWorkspace
            //
            this.miWorkspace.DropDownItems.AddRange [|
                (this.miFont :> System.Windows.Forms.ToolStripItem);
                (this.miTextColor :> System.Windows.Forms.ToolStripItem);
                (this.miBackColor :> System.Windows.Forms.ToolStripItem);
            |];
            this.miWorkspace.Name <- "miWorkspace";
            this.miWorkspace.Size <- new System.Drawing.Size (72, 20);
            this.miWorkspace.Text <- "&Workspace";
            //
            // miFont
            //
            this.miFont.Name <- "miFont";
            this.miFont.Size <- new System.Drawing.Size (158, 22);
            this.miFont.Text <- "F&ont";
            this.miFont.Click.Add (fun e -> this.miFont_Click e);
            //
            // miTextColor
            //
            this.miTextColor.Name <- "miTextColor";
            this.miTextColor.Size <- new System.Drawing.Size (158, 22);
            this.miTextColor.Text <- "&Text Color";
            this.miTextColor.Click.Add (fun e -> this.miTextColor_Click e);
            //
            // miBackColor
            //
            this.miBackColor.Name <- "miBackColor";
            this.miBackColor.Size <- new System.Drawing.Size (158, 22);
            this.miBackColor.Text <- "&Background Color";
            this.miBackColor.Click.Add (fun e -> this.miBackColor_Click e);
            //
            // sfdSave
            //
            this.sfdSave.Filter <- ml_pattern_filter;
            this.sfdSave.CheckFileExists <- true;
            this.sfdSave.FileOk.Add (fun e -> this.sfdSave_FileOk e);
            //
            // ofdOpen
            //
//            this.ofdOpen.FileName <- "openFileDialog1";
            this.ofdOpen.Filter <- ml_pattern_filter;
            this.ofdOpen.FileOk.Add (fun e -> this.ofdOpen_FileOk e);
            //
            // MainForm
            //
            this.AutoScaleDimensions <- new System.Drawing.SizeF (Convert.ToSingle 6, Convert.ToSingle 13);
            this.AutoScaleMode <- System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize <- new System.Drawing.Size (566, 401);
            this.Controls.Add this.tbWorkArea;
            this.Controls.Add this.msMain;
            this.MainMenuStrip <- this.msMain;
            this.Name <- "MainForm";
            this.Text <- "OCaml";
            this.FormClosing.Add (fun e -> this.MainForm_FormClosing e);
            this.msMain.ResumeLayout false;
            this.msMain.PerformLayout ();
            this.ResumeLayout false;
            this.PerformLayout ()
	member this.miOpen_Click (e:EventArgs) =
            this.ofdOpen.ShowDialog () |> ignore
	member this.miSave_Click (e : EventArgs) =
            this.sfdSave.ShowDialog () |> ignore
	member this.miExit_Click (e:EventArgs) =
            this.Close ()
	member this.miFont_Click (e:EventArgs) =
            if this.fdFont.ShowDialog () = DialogResult.OK then
                this.tbWorkArea.Font <- this.fdFont.Font
	member this.miTextColor_Click (e:EventArgs) =
            if this.cdColor.ShowDialog () = DialogResult.OK then
                this.tbWorkArea.ForeColor <- this.cdColor.Color
	member this.miBackColor_Click (e:EventArgs) =
            if this.cdColor.ShowDialog () = DialogResult.OK then
                this.tbWorkArea.BackColor <- this.cdColor.Color
	member this.ofdOpen_FileOk (e:CancelEventArgs) =
            using (new StreamReader (this.ofdOpen.FileName)) (fun sr ->
                let cod = sr.ReadToEnd () in
                sr.Close ();
                this.tbWorkArea.AppendText cod)
	member this.sfdSave_FileOk (e:CancelEventArgs) =
            using (new StreamWriter (this.sfdSave.FileName)) (fun sw ->
                sw.Write this.tbWorkArea.Text;
                sw.Close ())
	member this.MainForm_FormClosing (e:FormClosingEventArgs) =
            this.DoOnClose ()
        
        member this.tbWorkArea_KeyUp (e : KeyEventArgs) =
            if e.KeyData = Keys.Enter then begin
                let text =
                    if this.bookmark >= this.tbWorkArea.Text.Length then begin
                        this.bookmark <- this.tbWorkArea.Text.Length;
                        ""
                    end else if this.tbWorkArea.SelectionLength > 0 then begin
                        this.bookmark <- this.tbWorkArea.Text.Length;
                        this.tbWorkArea.SelectedText
                    end else this.tbWorkArea.Text.Substring this.bookmark
                in this.proc.StandardInput.Write text
            end
        member this.Process_Exited (e : EventArgs) =
            this.Close ()
        
        member this.DoOnStart () =
            this.proc.StartInfo.FileName <- "ocaml";
            this.proc.StartInfo.Arguments <- "";
            this.proc.Exited.Add (fun e -> this.Process_Exited e);
            this.proc.EnableRaisingEvents <- true;
            this.proc.Start () |> ignore;
            this.stopSignal <- new ManualResetEvent false;
            this.stdoutReader <- new Thread (this.DoReadFrom this.proc.StandardOutput);
            this.stderrReader <- new Thread (this.DoReadFrom this.proc.StandardError);
            this.stdoutReader.Start ();
            this.stderrReader.Start ()
        
        member this.DoOnClose () =
            this.stopSignal.Set () |> ignore;
            (fun () -> this.proc.StandardError.Close ()) |> swallow;
            (fun () -> this.proc.StandardInput.Close ()) |> swallow;
            (fun () -> this.proc.StandardOutput.Close ()) |> swallow;
            (fun () ->
                if not (this.proc.WaitForExit 200) then
                    this.proc.Kill ();
                this.proc.Close ()) |> swallow;
            (fun () ->
                if not (this.stdoutReader.Join 100) then
                    this.stdoutReader.Abort ()) |> swallow;
            (fun () ->
                if not (this.stderrReader.Join 100) then
                    this.stderrReader.Abort ()) |> swallow;
	member this.DoReadFrom (reader : System.IO.StreamReader) : ThreadStart =
            let MAX_BUF = 4096 in
            new ThreadStart (fun () ->
                let lbuffer = Array.zero_create MAX_BUF in
                let mutable bread = 0 in
                try while true do
                    bread <- reader.Read (lbuffer, 0, MAX_BUF);
                    while bread > 0 do
                        this.AppendText (new string (lbuffer, 0, bread));
                        bread <- reader.Read (lbuffer, 0, MAX_BUF)
                    done;
                    if this.stopSignal.WaitOne (10, true) then raise Exit
                done with _ -> ())
	member this.AppendText text =
            if this.tbWorkArea.InvokeRequired then
                let del = new Converter<_,_> (fun t -> this.AppendText t) in
                this.Invoke (del, [| box text |]) |> ignore
            else begin
                this.tbWorkArea.AppendText text;
                this.bookmark <- this.tbWorkArea.Text.Length
            end
    end

[<STAThread>]
let main () =
    Application.EnableVisualStyles ();
    Application.SetCompatibleTextRenderingDefault false;
    Thread.Sleep 400;
    Application.Run (new MainForm ())

[<STAThread>]
do main ()

By mgiovann on 12/28/2006 8:08 AM (permalink)

Thankyou very much!

By Kaveh Shahbazian on 12/30/2006 4:49 AM (permalink)

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