The IDirectSoundCapture::GetCaps method obtains the capabilities of the capture device.
HRESULT IDirectSoundCapture::GetCaps(
LPDSCCAPS lpDSCCaps
);
If the method succeeds, the return value is DS_OK.
If the method fails, the return value may be one of the following error values:
DSERR_INVALIDPARAM
DSERR_UNSUPPORTED
DSERR_NODRIVER
DSERR_OUTOFMEMORY
DSERR_UNINITIALIZED