The information in this topic pertains only to applications written in C and C++. See DirectSound Visual Basic Tutorials.

The tutorial requires the following definitions and global declarations:

#define NUMCAPTUREEVENTS 2
 
LPDIRECTSOUNDCAPTURE        lpdsc;
LPDIRECTSOUNDCAPTUREBUFFER  lpdscb;
LPDIRECTSOUNDNOTIFY         lpdsNotify;
DSCBUFFERDESC               dscbDesc;
HANDLE                      rghEvent[NUMCAPTUREEVENTS];
DSBPOSITIONNOTIFY           rgdscbpn[NUMCAPTUREEVENTS];
WAVEFORMATEX                wfx = 
                       {WAVE_FORMAT_PCM, 1, 22050, 44100, 2, 16, 0};
HMMIO                       hmmio;
MMCKINFO                    mmckinfoData, mmckinfoParent;
MMIOINFO                    mmioinfo;
DWORD                       dwTotalBytesWritten;
 

It is not necessary to create a DirectSound object in order to use DirectSoundCapture. However, if your application will be playing back sound as well as recording it, you should create DirectSound first.

In this tutorial, all the initialization of the capture system takes place in a function called InitDSoundCapture, which takes no parameters. The first step is to create the DirectSoundCapture object. You associate the object with the default capture device by passing NULL as the first parameter to the DirectSoundCaptureCreate function.

BOOL InitDSoundCapture(void)
{
 
    if FAILED(DirectSoundCaptureCreate(NULL, &lpdsc, NULL))
        return FALSE;
 

Next: Step 2: Set the Capture Format