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function MilliSecondsIdle: DWord;
liInfo.cbSize := SizeOf(TLastInputInfo) ;
Result := GetTickCount - liInfo.dwTime;
function SecondsIdle: DWord;
Result := MilliSecondsIdle Div 1000;
procedure TForm1.tmrIdleTimer(Sender: TObject);
lblLastInput.Caption:=Format('Last Input %f s',[MilliSecondsIdle/1000]);
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