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Hosting EXE Applications in a WinForm project

, 21 Dec 2004
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A custom control to launch and embed an EXE into a WinForm based application.

Sample Image

Introduction

Though not a common task, recently I needed to take an existing executable application and embed it into an application I was building. Oddly enough, I did not need any interaction between my application and the existing EXE. As it ends up, this is not a difficult thing to do. To make it even easier, I created a custom C# control that allows you to specify the name of an executable you want embedded into your application. The control takes care of all the rest.

How does it work

In design time, the user can specify the name of the executable to embed. When the control is created in runtime, it launches the application as follows:

Process p = null; 
try 
{
  // Start the process 
  p = System.Diagnostics.Process.Start(this.exeName); 

  // Wait for process to be created and enter idle condition 
  p.WaitForInputIdle(); 

  // Get the main handle
  appWin = p.MainWindowHandle; 
} 
catch (Exception ex) 
{ 
  MessageBox.Show(this, ex.Message, "Error"); 
}

After launching, the code must then set the parent of the executable's main window to the control handle. It does this as follows:

// Put it into this form
SetParent(appWin, this.Handle);

// Remove border and whatnot
SetWindowLong(appWin, GWL_STYLE, WS_VISIBLE);

// Move the window to overlay it on this window
MoveWindow(appWin, 0, 0, this.Width, this.Height, true);

Any time the control is resized, it must also resize the executable window. To do so, it does this in the Resize function:

protected override void OnResize(EventArgs e)
{
  if (this.appWin != IntPtr.Zero)
  {
    MoveWindow(appWin, 0, 0, this.Width, this.Height, true);
  }
  base.OnResize (e);
}

Lastly, when the control is destroyed, it should shut down the executable. To do so, it does the following:

protected override void OnHandleDestroyed(EventArgs e)
{
  // Stop the application
  if (appWin != IntPtr.Zero)
  {

    // Post a colse message
    PostMessage(appWin, WM_CLOSE, 0, 0);

    // Delay for it to get the message
    System.Threading.Thread.Sleep(1000);

    // Clear internal handle
    appWin = IntPtr.Zero;

  }

  base.OnHandleDestroyed (e);
}

History

  • 12-20-2004: Released.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Jay Nelson
Web Developer
United States United States
I have been developing software professionaly since 1991 writing software in Automation and Manufacturing environments. For 14 years I worked for companies that built custom robotic automated equipment for the semiconductor, telecommunications, and other industies. Presently, I work for a medical device manufacturer developing applications for the compact framework.

My undergraduate degrees are in Mathematics and Philosopy. My graduate degree is in Management Information Systems. I am MCSD certified in Visual C++ 6.0 and MCSD.NET certified in C#.

I enjoy triathlons and reading.

Comments and Discussions

 
AnswerRe: toopstrip disabled Pin
bryonmvi at 16-Sep-14 8:46
memberbryonmvi16-Sep-14 8:46 
Questionwindows 7 problem Pin
Member 9301028 at 25-Jul-12 13:26
memberMember 930102825-Jul-12 13:26 
AnswerRe: windows 7 problem Pin
RaRi2003 at 23-Nov-12 3:46
memberRaRi200323-Nov-12 3:46 
AnswerRe: windows 7 problem Pin
Member 10387432 at 7-Nov-13 13:27
memberMember 103874327-Nov-13 13:27 
QuestionHosting External Exe Application in a WPF Window. [modified] Pin
sukesh.gudikandulla at 27-May-12 7:35
membersukesh.gudikandulla27-May-12 7:35 
QuestionIt doesn't work in window 7 Pin
dhojonline at 3-Apr-12 3:44
memberdhojonline3-Apr-12 3:44 
AnswerRe: It doesn't work in window 7 Pin
k3v1n52 at 15-May-12 3:19
memberk3v1n5215-May-12 3:19 
GeneralRe: It doesn't work in window 7 Pin
Member 8994903 at 21-May-12 4:40
memberMember 899490321-May-12 4:40 
I have put a "this post based code" that works, answered in the post:
can't start programe that have login window. caixrz 21:56 11 Apr '07

Hope it helps.
QuestionHow to stop exe flashing up or appearing in taskbar Pin
JamesA_Dev at 26-Jan-12 2:24
memberJamesA_Dev26-Jan-12 2:24 
QuestionMenus are disabled Pin
delfo at 8-Aug-11 23:07
memberdelfo8-Aug-11 23:07 
AnswerRe: Menus are disabled Pin
bryonmvi at 16-Sep-14 8:47
memberbryonmvi16-Sep-14 8:47 
GeneralMy vote of 4 Pin
yanghe1117 at 3-May-11 5:16
memberyanghe11173-May-11 5:16 
GeneralMy vote of 5 Pin
Yusuf at 18-Jan-11 10:35
memberYusuf18-Jan-11 10:35 
QuestionAdvice needed Pin
HollyY at 18-Nov-10 13:57
memberHollyY18-Nov-10 13:57 
GeneralWin7 and Vista Incompatable Pin
cs_can at 3-Apr-10 4:28
membercs_can3-Apr-10 4:28 
QuestionPowerPoint Viewer Does Not seem to work Pin
Member 2653542 at 28-Dec-09 22:47
memberMember 265354228-Dec-09 22:47 
GeneralAnother problem Pin
il1723 at 16-Nov-09 6:36
memberil172316-Nov-09 6:36 
GeneralProblem Pin
il1723 at 16-Nov-09 5:59
memberil172316-Nov-09 5:59 
GeneralRe: Problem Pin
Elbe Alves Miranda at 24-Feb-11 4:24
memberElbe Alves Miranda24-Feb-11 4:24 
GeneralReally great, works perfectly after bug fix - thank you very much! Pin
Blasterwurm at 10-Nov-09 5:39
memberBlasterwurm10-Nov-09 5:39 
GeneralRe: Really great, works perfectly after bug fix - thank you very much! Pin
Atchyuta Rao at 9-Dec-09 21:29
memberAtchyuta Rao9-Dec-09 21:29 
GeneralRe: Really great, works perfectly after bug fix - thank you very much! Pin
cs_can at 3-Apr-10 6:41
membercs_can3-Apr-10 6:41 
GeneralApplication dosen't work Pin
treuveni at 26-Sep-09 10:37
membertreuveni26-Sep-09 10:37 
GeneralNice Article... But one clarification required ... Running the Code..it;s launching the custom control and IE .. separately [modified] Pin
Nikkiee at 28-May-09 8:00
memberNikkiee28-May-09 8:00 
GeneralRe: Nice Article... But one clarification required ... Running the Code..it;s launching the custom control and IE .. separately [modified] Pin
Blasterwurm at 10-Nov-09 3:18
memberBlasterwurm10-Nov-09 3:18 

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