The IDirectMusic::GetDefaultPort method retrieves the GUID of the default output port. This is the port that will be created if GUID_NULL is passed to IDirectMusic::CreatePort.
HRESULT GetDefaultPort(
LPGUID pguidPort
);
If the method succeeds, the return value is S_OK.
If it fails, the method may return E_POINTER.
Windows NT/2000: Requires Windows 2000.
Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
Header: Declared in dmusicc.h.