|Microsoft DirectX 9.0|
The SetPChannelsUsed method sets the
HRESULT SetPChannelsUsed( DWORD dwNumPChannels, DWORD* paPChannels );
Number of performance channels to set. This must be equal to the number of members in the array pointed to by paPChannels.
Address of an array of performance channel identifiers.
If the method succeeds, the return value is S_OK.
If it fails, the method can return one of the error values shown in the following table.
This method enables the performance to ascertain which ports are being used by the segment so that it can determine the actual latency, rather than providing for the worst case.
Header: Declared in dmusici.h.