تغيير الوقت و التاريخ للوندوز برمجيا

function SetPCSystemTime(tDati: TDateTime): Boolean;
var
  tSetDati: TDateTime;
  vDatiBias: Variant;
  tTZI: TTimeZoneInformation;
  tST: TSystemTime;
begin
  GetTimeZoneInformation(tTZI);
  vDatiBias := tTZI.Bias / 1440;
  tSetDati := tDati + vDatiBias;
  with tST do
  begin
    wYear := StrToInt(FormatDateTime('yyyy', tSetDati));
    wMonth := StrToInt(FormatDateTime('mm', tSetDati));
    wDay := StrToInt(FormatDateTime('dd', tSetDati));
    wHour := StrToInt(FormatDateTime('hh', tSetDati));
    wMinute := StrToInt(FormatDateTime('nn', tSetDati));
    wSecond := StrToInt(FormatDateTime('ss', tSetDati));
    wMilliseconds := 0;
  end;
  SetPCSystemTime := SetSystemTime(tST);
end;