| Microsoft DirectX 8.1 (C++) | 
The GetNumChannelGroups method retrieves the number of channel groups on the port.
Syntax
HRESULT GetNumChannelGroups(
  LPDWORD pdwChannelGroups
);
Parameters
pdwChannelGroups
Address of a variable that receives the number of channel groups.
Return Values
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.
| Return code | 
| E_FAIL | 
| E_INVALIDARG | 
| E_NOTIMPL | 
| E_OUTOFMEMORY | 
Requirements
Header: Declared in dmusicc.h.
See Also