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CREATE_SEPARATE_WOW_VDM Constant

Posted on 1998-06-08
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Last Modified: 2008-03-10
Hi there,

I want to use a CreateProcess API create a shelled process.  I can achieve this fine but also want to create the process in it's own WOW VDM - anyone know what the constant value of CREATE_SEPARATE_WOW_VDM is???  I've seen it mentioned all over the place and it's even documented in the Win32 API book - but unfortunately they don't tell you what the value actually is!!

Thanks

Pete
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Question by:peterwest
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yowkee earned 400 total points
ID: 1462810
In win32 documentation, using CREATE_SEPARATE_WOW_VDM in API CreateProcess:

Windows NT only: This flag is valid only when starting a 16-bit Windows-based application. If set, the new process is run in a private Virtual DOS Machine (VDM). By default, all 16-bit Windows-based applications are run as threads in a single, shared VDM. The advantage of running separately is that a crash only kills the single VDM; any other programs running in distinct VDMs continue to function normally. Also, 16-bit Windows-based applications that are run in separate VDMs have separate input queues. That means that if one application hangs momentarily, applications in separate VDMs continue to receive input.

*** And its value is:
Const CREATE_SEPARATE_WOW_VDM = &H800

Note: you could find it in file winbase.h if you have VC installed.
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by:peterwest
ID: 1462811
Thanks very much - just what I needed - my application no longer crashes with WOW error messages!!!

Cheers

Pete

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