怎样使PC喇叭发声?(300分)

向大家请教一个问题，用Delphi编程怎样使PC喇叭发声，不胜感谢！

beep;
只能响一声^_^，希望你不是想他出音乐…

Beep是没错啦！
我的天，300分！你不会真的想听音乐吧？？

windows.beep(Freq, Delay)

{
Windows NT/2000/XP:
Windows.Beep(dwFreq, dwDuration);

dwFreq : frequency, in hertz, of the sound.
dwDuration : duration, in milliseconds, of the sound.
}

// Windows 9x/NT-Platforms:
procedure SetPort(address, Value: Word);
var
bValue: Byte;
begin

bValue := trunc(Value and 255);
asm
mov dx, address
mov al, bValue
out dx, al
end;

end;

function GetPort(address: Word): Word;
var
bValue: Byte;
begin

asm
mov dx, address
in al, dx
mov bValue, al
end;

GetPort := bValue;
end;

procedure Sound(aFreq, aDelay: Integer);

procedure do
Sound(Freq: Word);
var
B: Byte;
begin

if Freq > 18 then

begin

Freq := Word(1193181 div Longint(Freq));
B := Byte(GetPort($61));

if (B and 3) = 0 then

begin

SetPort($61, Word(B or 3));
SetPort($43, $B6);
end;

SetPort($42, Freq);
SetPort($42, Freq shr 8);
end;

end;

procedure Delay(MSecs: Integer);
var
FirstTickCount: LongInt;
begin

FirstTickCount := GetTickCount;
repeat
Sleep(1);
//or use Application.ProcessMessages instead of Sleep
until ((GetTickCount - FirstTickCount) >= Longint(MSecs));
end;


begin

if Win32Platform = VER_PLATFORM_WIN32_NT then

begin

Windows.Beep(aFreq, aDelay);
end
else

begin

do
Sound(aFreq);
Delay(aDelay);
end;

end;

procedure NoSound;
var
Value: Word;
begin

if not (Win32Platform = VER_PLATFORM_WIN32_NT) then

begin

Value := GetPort($61) and $FC;
SetPort($61, Value);
end;

end;


// Example:
procedure TForm1.Button1Click(Sender: TObject);
begin

Sound(500, 1000);
Sound(700, 1000);
Sound(900, 1000);
NoSound;
end;

编一个超CPU的程序。超烧了CPU后，就会有动听的报警声。

用Beep函数就可以了，很方便的。

谢谢peng_qs,
也谢谢：娃娃,SanDao,softdog如此热心.