WM_TIMECHANGE message
A message that is sent whenever there is a change in the system time.
A window receives this message through its WindowProc function.
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // not used; must be zero
LPARAM lParam // not used; must be zero
);
Parameters
-
hwnd
-
A handle to window.
-
uMsg
-
WM_TIMECHANGE identifier.
-
wParam
-
Not used; must be zero.
-
lParam
-
Not used; must be zero.
Return value
An application should return zero if it processes this message.
Remarks
An application should not broadcast this message, because the system will broadcast this message when the application changes the system time.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|