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.
WORD SetClassWord( HWND hWnd, int nIndex, WORD wNewWord );
A handle to the window and, indirectly, the class to which the window belongs.
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.
The replacement value.
Type: Type: WORD
If the function succeeds, the return value is the previous value of the specified 16-bit integer. If the value was not previously set, the return value is zero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||winuser.h (include Windows.h)|