The IDirectSoundCaptureBuffer::GetCaps method returns the capabilities of the DirectSound Capture Buffer.
HRESULT GetCaps(
LPDSCBCAPS lpDSCBCaps
);
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_OUTOFMEMORY
Windows NT: Use version 5.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in dsound.h.
Import Library: Use dsound.lib.