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Delphi source code for Windows >> Change the system time

Category: Windows
Title: Change the system time
Date added: 15.03.2006
Hits: 21441

The input strings for date and time depends on the format you are using.

procedure TForm1.Button1Click(Sender: TObject);
  SystemTime: TSystemTime;
  NewTime, NewDate: string;
  NewTime := '12:00:00';
  NewDate := '01.01.2006'; 
  DateTimeToSystemTime(StrToDate(NewDate) + StrToTime(NewTime), SystemTime);
  // Tell windows, that the Time changed!
  PostMessage(HWND_BROADCAST, WM_TIMECHANGE, 0, 0); // *

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