Обновлено: 01 декабря, 2018

Изменение громкости звуков в Windows в Delphi

uses MMSystem; 
function GetWaveVolume: DWord; 
var
  Woc   : TWaveOutCaps; 
  Volume: DWord; 
begin
  result:= 0; 
  if WaveOutGetDevCaps(WAVE_MAPPER, @Woc, sizeof(Woc))= MMSYSERR_NOERROR then
  begin
    if Woc.dwSupport and WAVECAPS_VOLUME= WAVECAPS_VOLUME then
    begin
      WaveOutGetVolume(WAVE_MAPPER, @Volume); 
      Result := Volume; 
    end; 
  end; 
end; 
 
procedure SetWaveVolume(const AVolume: DWord); 
var Woc : TWaveOutCaps;
begin
  if WaveOutGetDevCaps(WAVE_MAPPER, @Woc, sizeof(Woc)) = MMSYSERR_NOERROR then
  begin
    if Woc.dwSupport and WAVECAPS_VOLUME = WAVECAPS_VOLUME then
      WaveOutSetVolume(WAVE_MAPPER, AVolume); 
  end; 
end; 
 
procedure TForm1.Button1Click(Sender: TObject); 
begin
  Beep; 
end; 
 
procedure TForm1.Button2Click(Sender: TObject);
var
  LeftVolume:    
  Word; RightVolume: Word;
begin
  LeftVolume:=StrToInt(Edit1.Text); 
  RightVolume:=StrToInt(Edit2.Text); 
  SetWaveVolume(MakeLong(LeftVolume, RightVolume)); 
end; 
 
procedure TForm1.Button3Click(Sender:TObject); 
begin
  Caption : =IntToStr(GetWaveVolume); 
end;

(11 оценок, среднее: 4,64 из 5)

Загрузка...