why doesn't winmain set the errorlevel?
- by Brian R. Bondy
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
MessageBox(NULL, _T("This should return 90 no?"), _T("OK"), MB_OK);
return 90;
}
Why does the above program correctly display the message box, but does not set the error level?
I compile this program to the name a.exe. Then from command prompt I type:
c:\> a.exe
(message box is displayed, I press ok)
c:\> echo %ERRORLEVEL%
0
I get the same results if I do exit(90); right before the return. It still says 0.
I also tried to start the program via CreateProcess and obtain the result with GetExitCodeProcess but it also returns 0 to me. I did error checking to ensure it was all started correctly.
I originally seen this problem in a more complex program. But made this simple program to verify the problem. Results are the same, both programs that have WinMain return 0 always.
I tried both x64, x86 and unicode and MBCS compiling options. All give 0 as an error level/status code.
