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How to disable and enable Ctrl + Alt + Del

Title: How to disable and enable Ctrl + Alt + Del? Question: How to disable and enable Ctrl + Alt + Del? Answer: Uses: None Component: TButton Disable Ctrl + Alt + Del: procedure TForm1.Button1Click(Sender: TObject); var OldValue : LongBool; begin SystemParametersInfo(97, Word(False),@OldValue); end; Enable Ctrl + Alt + Del: procedure TForm1.Button1Click(Sender: TObject); var OldValue : LongBool; begin SystemParametersInfo(97, Word(True),@OldValue); end;