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procedure TForm1.Button1Click(Sender: TObject);
var
  OldTextColor: TColorRef;
  OldBkColor: TColorRef;
  OldBkMode: Integer;
begin
  OldTextColor := SetTextColor(Form1.Canvas.Handle, clYellow);
  OldBkColor := SetBkColor(Form1.Canvas.Handle, clGreen);
  OldBkMode := SetBkMode(Form1.Canvas.Handle, OPAQUE);
  TextOut(Form1.Canvas.Handle, 20, 20, ' лучше всех! ;-)', 27);
  SetBkMode(Form1.Canvas.Handle, OldBkMode);
  SetBkColor(Form1.Canvas.Handle, OldBkColor);
  SetTextColor(Form1.Canvas.Handle, OldTextColor);
end;