| Microsoft DirectX 8.1 (C++) | 
Retrieves a list of all the player and/or group identifiers for the session.
HRESULT EnumPlayersAndGroups( DPNID *const prgdpnid, DWORD *const pcdpnid, const DWORD dwFlags );
Returns S_OK if successful, or one of the following error values.
| DPNERR_BUFFERTOOSMALL | 
| DPNERR_INVALIDFLAGS | 
Because group and player information changes frequently, the required buffer size returned may change between subsequent calls. Check and reallocate the buffer until the method succeeds.
  Windows NT/2000/XP: Available as a redistributable for Windows 2000 and later.
  Windows 98/Me: Available as a redistributable for Windows 98 and later.
  Header: Declared in Dplay8.h.