Some system message structures have changed for DirectPlay 5, with new data members added to the end. Make sure you only reference these new members if you are using the IDirectPlay3 interface.
The system message structures that have new members for DirectPlay 5 are:
| Structure | New Members |
| DPMSG_CREATEPLAYERORGROUP | DPID dpIdParent |
| DWORD dwFlags | |
| DPMSG_DESTROYPLAYERORGROUP | DPNAME dpnName |
| DPID dpIdParent | |
| DWORD dwFlags |