Microsoft KB Archive/139825

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FIX: Error C2664 'AVIFileCreateStream' from Visual C++ 2.0/2.1

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Q139825

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The information in this article applies to:


 * Microsoft Platform Software Development Kit (SDK), on platform(s):
 * Microsoft Windows NT Server versions 3.5, 3.51, 4.0
 * Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0
 * the operating system: Microsoft Windows 2000
 * Microsoft Visual C++, versions 2.0, 2.1

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SYMPTOMS
The following error is generated when you compile an application under Visual C++ version 2.0 or 2.1 that calls AVIFileCreateStream and does not use UNICODE:

error C2664: 'AVIFileCreateStream' : cannot convert parameter 3 from 'struct _AVISTREAMINFOA*' to 'struct _AVISTREAMINFOW*'

CAUSE
The Vfw.h header file from Visual C++ version 2.0 or 2.1 has the following declaration for the AVIFileCreateStream function:

STDAPI AVIFileCreateStream(PAVIFILE pfile,

PAVISTREAM FAR *ppavi, AVISTREAMINFOW FAR *psi);

Note the wide version of the structure in the third parameter: AVISTREAMINFOW. There is no ANSI declaration for this function in vfw.h. The header file is incorrect. It should list an ANSI version of the function that takes an ANSI AVISTREAMINFO in addition to the UNICODE version.

STATUS
Microsoft has confirmed this to be a bug in Visual C++ versions 2.0 and 2.1. This bug was corrected in Visual C++ version 2.2. The Vfw.h header file from that product declares an AVIFileCreateStreamA function in addition to the W variety, AVIFileCreateStreamW.

Additional query words: 3.50 2.10 2.00 4.00 Windows 95

Keywords : kbmm

Issue type :

Technology : kbWin32SDKSearch kbAudDeveloper kbSDKSearch