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WinExec

Posted on 1998-03-03
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Last Modified: 2013-12-03
What am I doing wrong?  I want to run a Windows program from a windows program.  When ever I run the following code I get an error 2 (file not found).

#include <windowsx.h>
#include <windows.h>
#include <winbase.h>
#include <stdio.h>

#pragma argsused


/**************************************************************/
int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
           LPSTR lpCmdLine, int nCmdShow)
{
WORD wReturn;
char szMsg[80];

wReturn = WinExec("DRAW", SW_SHOWNORMAL );

if (wReturn < 32) {
    sprintf(szMsg, "WinExec failed; error code = %d", wReturn);
    MessageBox(NULL, szMsg, "Error", MB_ICONSTOP);
}
else {
    sprintf(szMsg, "WinExec returned %d", wReturn);
    MessageBox(NULL, szMsg, "", MB_OK);

}


This is the example out of the help file, yet I can't get it to do any thing other than return a "file not found" error.

I have also tried LoadModule() with no sucess.

Thanks for your help.

AJY
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Question by:youngs101497
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7 Comments
 
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Accepted Solution

by:
tflai earned 200 total points
ID: 1411677
It looks to me that your application and the EXE that you want to launch are not in the same directory.
0
 
LVL 4

Expert Comment

by:tflai
ID: 1411678
Use GetModuleFileName(NULL, szCurrentPath, sizeof(szCurrentPath)) to get your application's work directory, then append that with "DRAW".
(That's if you want the application and "DRAW" in the same directory.)
0
 
LVL 4

Expert Comment

by:tflai
ID: 1411679
Oops!  The "proposed answer" should read:
"It looks to me that your application's current work directory is not the same as the directory that DRAW is in."
Or, if you know where DRAW is always:
WinExec("c:\drawpath\DRAW", SW_SHOWNORMAL);
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Author Comment

by:youngs101497
ID: 1411680
WinExec is described to use a search pattern which in the case of draw, does include thw Windows directory.  I have used absolute paths and relitive paths with no success.  The problem does not seem to be in the path paramater.

AJY
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LVL 4

Expert Comment

by:tflai
ID: 1411681
How'd about SetCurrentDirectory() to the path that DRAW is in?
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Author Comment

by:youngs101497
ID: 1411682
I found my problem.  But when I call the program the two run concurrently.  I need the calling program to wait until the called program concludes before the calling program continues.  Can I do this with WinExec?  If not what can I use.

AJY
0
 
LVL 4

Expert Comment

by:tflai
ID: 1411683
Launch DRAW with CreateProcess() or ShellExecuteEx(), then wait on it to finish with WaitForSingleObject().
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