Question and Answer Database
FAQ2020D.txt Detecting if the system time has been changed
Category :Windows API
Platform :All
Product :All 32 bit
Question:
Is it possible to detect if the system time has been changed by
another application?
Answer:
The following example demonstrates trapping the WM_TIMECHANGE
message. Note: Applications that change the system time should
broadcast a WM_TIMECHANGE message to all top level windows.
type
TForm1 = class(TForm)
private
{ Private declarations }
procedure WMTIMECHANGE(var Message: TWMTIMECHANGE);
message WM_TIMECHANGE;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.WMTIMECHANGE(var Message: TWMTIMECHANGE);
begin
Form1.Caption := 'Time Changed';
end;
7/16/98 4:31:28 PM
Last Modified: 01-SEP-99