声音,左右声道
unit SControls;interfaceuses
Windows, Mmsystem, Classes, Controls, ComCtrls, Messages, SysUtils, Graphics, Forms, Dialogs,
StdCtrls;type
TForm1 = class(TForm)
TrackBar1: TTrackBar;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
TrackBar2: TTrackBar;
TrackBar3: TTrackBar;
procedure TrackBar1Change(Sender: TObject);
procedure TrackBar2Change(Sender: TObject);
procedure TrackBar3Change(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.DFM}procedure TForm1.TrackBar1Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar1.Position;
v:=(t shl 8)or(t shl 24);
WaveOutSetVolume(0,v);
end;procedure TForm1.TrackBar2Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar2.Position;
WaveOutGetVolume(0,@v);
v:=v and $ffff0000 or (t shl 8);
WaveOutSetVolume(0,v);
end;procedure TForm1.TrackBar3Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar3.Position;
WaveOutGetVolume(0,@v);
v:=v and $0000ffff or (t shl 24);
WaveOutSetVolume(0,v);
end;procedure TForm1.FormCreate(Sender: TObject);
var
v:LongInt;
begin
WaveOutGetVolume(0,@v);
TrackBar1.Position:=v;
TrackBar2.Position:=hi(v);
TrackBar3.Position:=hi(v shr 16);
end;end.
unit SControls;interfaceuses
Windows, Mmsystem, Classes, Controls, ComCtrls, Messages, SysUtils, Graphics, Forms, Dialogs,
StdCtrls;type
TForm1 = class(TForm)
TrackBar1: TTrackBar;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
TrackBar2: TTrackBar;
TrackBar3: TTrackBar;
procedure TrackBar1Change(Sender: TObject);
procedure TrackBar2Change(Sender: TObject);
procedure TrackBar3Change(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.DFM}procedure TForm1.TrackBar1Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar1.Position;
v:=(t shl 8)or(t shl 24);
WaveOutSetVolume(0,v);
end;procedure TForm1.TrackBar2Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar2.Position;
WaveOutGetVolume(0,@v);
v:=v and $ffff0000 or (t shl 8);
WaveOutSetVolume(0,v);
end;procedure TForm1.TrackBar3Change(Sender: TObject);
var
t,v:LongInt;
begin
t:=TrackBar3.Position;
WaveOutGetVolume(0,@v);
v:=v and $0000ffff or (t shl 24);
WaveOutSetVolume(0,v);
end;procedure TForm1.FormCreate(Sender: TObject);
var
v:LongInt;
begin
WaveOutGetVolume(0,@v);
TrackBar1.Position:=v;
TrackBar2.Position:=hi(v);
TrackBar3.Position:=hi(v shr 16);
end;end.
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