The IDirectSoundCaptureBuffer::Start method puts the capture buffer into the capture state and begins capturing data into the buffer. If the capture buffer is already in the capture state then the method has no effect.
HRESULT Start(
DWORD dwFlags
);
DSCBSTART_LOOPING
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_NODRIVER
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.