function GetLineInHandle(AudioType : integer) : integer;
var
i : integer;
AudioCaps : TAuxCaps;
begin
result := 0;
for i := 0 to auxGetNumDevs - 1 do begin
auxGetDevCaps(i, @AudioCaps, sizeof(AudioCaps));
if AudioCaps.wTechnology = AudioType then begin
Result := i;
Break;
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
v : DWORD;
begin
AuxGetVolume(GetLineInHandle(AUXCAPS_CDAUDIO), @v);
Edit1.Text := IntToStr(LoWord(v));
Edit2.Text := IntToStr(HiWord(v));
end;
procedure TForm1.Button2Click(Sender: TObject);
var
v : DWORD;
begin
v := MakeLong(Word(StrToInt(Edit1.Text)),
Word(StrToInt(Edit2.Text)));
AuxSetVolume(GetLineInHandle(AUXCAPS_CDAUDIO), v);
end;
procedure TForm1.Button3Click(Sender: TObject);
var
v : DWORD;
begin
AuxGetVolume(GetLineInHandle(AUXCAPS_AUXIN), @v);
Edit3.Text := IntToStr(LoWord(v));
Edit4.Text := IntToStr(HiWord(v));
end;
procedure TForm1.Button4Click(Sender: TObject);
var
v : DWORD;
begin
v := MakeLong(Word(StrToInt(Edit3.Text)),
Word(StrToInt(Edit4.Text)));
AuxSetVolume(GetLineInHandle(AUXCAPS_AUXIN), v);
end;
//音量控制
procedure TForm1.TrackBar1Change(Sender: TObject);
var
t,v:Longint;
begin
// if a=0 then Exit;
t:=TrackBar1.Position;
v:=(t shl 8)or(t shl 24);
waveOutSetVolume(0,v);
end;
procedure tform1.trackbar1changer (sender:tobject);//左声道
var t,v:longint;
begin
t:=trackbar1.postion;
wavoutgetvolume(0,@v);
v:=v and $ffff0000 or (t shl 8);
wavoutsetvolume(0,v);
end;
procedure tform1.trackbar2changer (sender:tobject);//右声道
var t,v:longint;
begin
t:=trackbar2.postion;
wavoutgetvolume(0,@v);
v:=v and $0000ffff or (t shl 24);
wavoutsetvolume(0,v);
end;
//获得当前音量值
procedure TForm1.FormCreate(Sender: TObject);
var
v:longint;
begin
waveOutGetVolume(0,@v);
TrackBar2.Position:=hi(v);
TrackBar3.Position:=hi(v shr 16);
if hi(v)>hi(v shr 16) then
TrackBar1.Position:=hi(v)
else
TrackBar1.Position:=hi(v shr 16);
end;