WM_TIMECHANGE

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

An application sends the WM_TIMECHANGE message to all top-level windows after changing the system time.

WM_TIMECHANGE

wParam = 0; // not used, must be zero

lParam = 0; // not used, must be zero

Parameters
This message has no parameters.

Return Values
An application should return zero if it processes this message.

Remarks
An application that changes the system time should send this message to all top-level windows. To send the WM_TIMECHANGE message to all top-level windows, an application can use the SendMessage function with the hwnd parameter set to HWND_TOPMOST.