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SetClassWord The SetClassWord function replaces the 16-bit (word) value at the specified offset into the extra class memory for the window class to which the specified window belongs.
VB4-32,5,6
Declare Function SetClassWord Lib "user32" Alias "SetClassWord" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal wNewWord As Long) As Long |
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Operating Systems Supported |
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Requires Windows NT 3.1 or later; Requires Windows 95 or later |
- hWnd
Identifies the window and, indirectly, the class to which the window belongs.
- nIndex
Specifies the zero-based byte offset of the value to be replaced. Valid values are in the range zero through the number of bytes of class memory minus two; for example, if you specified 10 or more bytes of extra class memory, a value of 8 would be an index to the fifth 16-bit integer.
- wNewWord
Specifies the replacement value. |
If the function succeeds, the return value is the previous value of the specified 16-bit integer.
If the function fails, the return value is zero. To get extended error information, call GetLastError. |
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