The GetClassWord function retrieves the 16-bit (word) value at the specified offset into the extra class memory for the window class to which the specified window belongs.
Other than GCW_ATOM and GCW_HICONSM, the GCW_ values support by 16-bit Windows are obsolete. You must use the GetClassLong function to retrieve the class values of a window.
WORD GetClassWord(
HWND hWnd, |
// handle of window |
int nIndex |
// offset of value to retrieve |
); |
Value |
Action |
GCW_ATOM |
Retrieves an ATOM value that uniquely identifies the window class. This is the same atom that the RegisterClass function returns. |
GCW_HICONSM |
Retrieves the handle of the small icon associated with the window. |
If the function succeeds, the return value is the requested 16-bit value.
If the function fails, the return value is otherwise, it is zero. To get extended error information, call GetLastError.
Reserve extra class memory by specifying a nonzero value in the cbClsExtra member of the WNDCLASS structure used with the RegisterClass function.
GetClassLong, RegisterClass, SetClassLong, SetClassWord, WNDCLASS
file: /Techref/os/win/api/win32/func/src/f28_6.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2024/8/16 10:05,
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