Procedure TDemoForm.SlideBtnClick (Sender : TObject);
Var
I : Integer;
Begin
For I:=100 To 150 Do DoBleep (I*10, 10);
For I:=150 Downto 100 Do DoBleep (I*10, 10);
End;
procedure TForm1.Button1Click(Sender: TObject);
const
MHZ : Array[0..7] of Integer=(523,587,659,698,784,880,988,1047);
var
I:Integer;
begin
for I:=Low(MHZ) to High(MHZ) do
windows.beep(MHZ[I],500);
for I:=High(MHZ) downto Low(MHZ) do
windows.beep(MHZ[I],500);
windows.beep(587,500);
windows.beep(784,500);
end;