Probleme mit MmSystem Funktionen für die Soundkarte...

[Schucki]

Ja OK...
Ein neues Projekt, ein Memo1 und ein Button1 drauf...
Quelltext dann diesen hier...

Delphi-Quellcode:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, MmSystem, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure GetWaveOutDevicesInfo(DeviceNames: TStrings);
var
  DNum: Integer;
  i: Integer;
  Caps: TWaveOutCaps;

begin
  DNum := waveOutGetNumDevs;  // Number of Devices
  for i := 0 to DNum - 1 do begin
    ZeroMemory(@Caps, SizeOf(TWaveOutCaps));
    waveOutGetDevCaps(i, @Caps, SizeOf(TWaveOutCaps));
    DeviceNames.Add(Format('Device %d/%d information follows...', [i,DNum-1] ));
    DeviceNames.Add(string(Caps.szPname));
    DeviceNames.Add('----------------------------------');
  end;
end;

procedure GetWaveOutVolumeInfo(logInfo: TStrings);
var
  DNum: Integer;
  i: integer;
  WaveOutCaps: TWaveOutCaps;
  Volume: dword;
  bolError: boolean;
  wLVol: word;
  wRVol: word;
begin
  DNum := waveOutGetNumDevs;  // Number of Devices
  for i := 0 to DNum - 1 do begin
    bolError := True;
    ZeroMemory(@WaveOutCaps, SizeOf(TWaveOutCaps));
    Volume:=0;
    if WaveOutGetDevCaps(i, @WaveOutCaps, SizeOf(WaveOutCaps)) = MMSYSERR_NOERROR
    then if WaveOutCaps.dwSupport and WAVECAPS_VOLUME = WAVECAPS_VOLUME
    then begin
      bolError := not WaveOutGetVolume(i, @Volume) = MMSYSERR_NOERROR;
      wLVol := HiWord(volume);
      wRVol := LoWord(volume);
    end;
    if not bolError then logInfo.Add(Format('(%d) %d - %d',[i, wLVol, wRVol]))
                    else logInfo.Add(Format('(%d) - no volume info',[i]));
    logInfo.Add('----------------------------------');
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Memo1.Lines.Clear;
  GetWaveOutDevicesInfo(Memo1.Lines);
  GetWaveOutVolumeInfo(Memo1.Lines);
end;

end.

Output im Memeo1 bei mir...

Code:

Device 0/2 information follows...
Lautsprecher (2- Realtek High D
----------------------------------
Device 1/2 information follows...
Realtek Digital Output (2- Real
----------------------------------
Device 2/2 information follows...
Realtek Digital Output(Optical)
----------------------------------
(0) 65535 - 65535
----------------------------------
(1) 65535 - 65535
----------------------------------
(2) 65535 - 65535
----------------------------------