The GetWindowWord function retrieves a 16-bit (word) value at the specified offset into the extra window memory for the specified window.
WORD GetWindowWord(
| HWND hWnd, | // handle of window |
| int nIndex | // offset of value to retrieve |
| ); |
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 retrieved. Valid values are in the range zero through the number of bytes of extra 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.
Return Values
If the function succeeds, the return value is the requested 16-bit value.
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.
The GWW_ values are obsolete in Win32. You must use the GetWindowLong function to retrieve information about the window.
See Also
GetParent, GetWindowLong, RegisterClass, SetParent, SetWindowLong, SetWindowWord, WNDCLASS