⤷ Disable mouse and keyboard

Use BlockInput procedure to lock keyboard and mouse. This procedure with True parameter disables manipulators and with False parameter enables them.

procedure BlockInput(ABlockInput : boolean); stdcall; external 'USER32.DLL';
...
procedure TForm1.Button1Click(Sender: TObject);
begin
  BlockInput(True);
  Sleep(5000);
  BlockInput(False);
end;
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