procedure TForm1.Button1Click(Sender: TObject);
begin
SystemParametersInfo(SPI_SETKEYBOARDSPEED,0,nil,SPIF_SENDCHANGE); //En Düşük
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
SystemParametersInfo(SPI_SETKEYBOARDSPEED,50,nil,SPIF_SENDCHANGE); //En Yüksek
end;