Microsoft KB Archive/11606

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INFO: Use of Allocations w/ cbClsExtra & cbWndExtra in Windows

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Q11606

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK)
 * Microsoft Win32 Software Development Kit (SDK)

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SUMMARY
The following is an explanation of the use of the allocations with cbClsExtra and cbWndExtra?:


 * cbClsExtra: Extra bytes to allocate to CLASS data structure in USER.EXE local heap when RegisterClass is called. Accessed by Get/Set CLASS Word/Long ;.
 * cbWndExtra: Extra bytes to allocate to WND data structure in USER.EXE local heap when CreateWindow is called. Accessed by Get/Set WND Word/Long ;.

You can use these structures at your discretion and for any purpose you desire.

Additional query words:

Keywords : kbOSWinNT kbOSWin2000 kbSDKWin32 kbGrpDSUser kbOSWin kbWndw kbWndwClass kbWndwProp

Issue type : kbinfo

Technology : kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWin32sSearch kbWinSDKSearch