INFO: Use of Allocations w/ cbClsExtra & cbWndExtra in Windows
ID: Q11606
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The information in this article applies to:
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Microsoft Windows Software Development Kit (SDK)
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Microsoft Win32 Software Development Kit (SDK)
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Microsoft Windows 2000
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 : kbNTOS kbWinOS2000 kbSDKWin32 kbGrpUser kbWinOS kbWndw kbWndwClass kbWndwProp
Version : WINDOWS:
Platform : WINDOWS
Issue type : kbinfo