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
);

Parameters

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 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.

wNewWord

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.

Remarks

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