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SetWindowWord info  Overview  Group

The SetWindowWord function replaces the 16-bit (word) value at the specified offset into the extra window memory for the specified window.

The GWW_ values supported by 16-bit Windows are obsolete. You must use the SetWindowLong function to set information about the window.

WORD SetWindowWord(

    HWND hWnd,

// handle of window

    int nIndex,

// offset of value to set

    WORD wNewWord 

// new value



Identifies the window and, indirectly, the class to which the window belongs.
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 window memory, minus two; for example, if you specified 10 or more bytes of extra window memory, a value of 8 would be an index to the fifth 16-bit integer.
Specifies the replacement value.

Return Values

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.


Reserve extra window memory by specifying a nonzero value in the cbWndExtra member of the WNDCLASS structure used with the RegisterClass function.

See Also

GetParent, GetWindowLong, GetWindowWord, RegisterClass, SetParent, SetWindowLong, WNDCLASS 

file: /Techref/os/win/api/win32/func/src/f84_7.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2022/5/26 01:15,

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