Mega Code Archive
Wave volum kontrolü
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attila_t2000@yahoo.co.uk
Wave Volum Kontrolü
uses
MMSystem;
function GetWaveVolume(var LVol: DWORD; var RVol: DWORD): Boolean;
var
WaveOutCaps: TWAVEOUTCAPS;
Volume: DWORD;
begin
Result := False;
if WaveOutGetDevCaps(WAVE_MAPPER, @WaveOutCaps, SizeOf(WaveOutCaps)) = MMSYSERR_NOERROR then
if WaveOutCaps.dwSupport and WAVECAPS_VOLUME = WAVECAPS_VOLUME then
begin
Result := WaveOutGetVolume(WAVE_MAPPER, @Volume) = MMSYSERR_NOERROR;
LVol := LoWord(Volume);
RVol := HiWord(Volume);
end;
end;
function SetWaveVolume(const AVolume: DWORD): Boolean;
var
WaveOutCaps: TWAVEOUTCAPS;
begin
Result := False;
if WaveOutGetDevCaps(WAVE_MAPPER, @WaveOutCaps, SizeOf(WaveOutCaps)) = MMSYSERR_NOERROR then
if WaveOutCaps.dwSupport and WAVECAPS_VOLUME = WAVECAPS_VOLUME then
Result := WaveOutSetVolume(WAVE_MAPPER, AVolume) = MMSYSERR_NOERROR;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
LVol: Word;
RVol: Word;
begin
LVol := SpinEdit1.Value; // max. is 65535
RVol := SpinEdit2.Value; // max. is 65535
SetWaveVolume(MakeLong(LVol, RVol));
end;
procedure TForm1.Button2Click(Sender: TObject);
var
LVol: DWORD;
RVol: DWORD;
begin
if GetWaveVolume(LVol, RVol) then
begin
SpinEdit1.Value := LVol;
SpinEdit2.Value := RVol;
end;
end;
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