The IDirectSound::GetCaps method retrieves the capabilities of the hardware device that is represented by the DirectSound object.
HRESULT GetCaps(
LPDSCAPS lpDSCaps
);
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_GENERIC
DSERR_INVALIDPARAM
DSERR_UNINITIALIZED
Information retrieved in the DSCAPS structure describes the maximum capabilities of the sound device and those currently available, such as the number of hardware mixing channels and the amount of on-board sound memory. You can use this information to fine-tune performance and optimize resource allocation.
Because of resource-sharing requirements, the maximum capabilities in one area might be available only at the cost of another area. For example, the maximum number of hardware-mixed streaming sound buffers might be available only if there are no hardware static sound buffers.
Windows NT: Use version 4.0 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.