internal extern static int PeerCollabAsyncInviteEndpoint(IntPtr pcEndpoint,
                                                          ref PEER_INVITATION pcInvitation,
                                                          SafeWaitHandle hEvent,
                                                          out SafeCollabInvite phInvitation);
 internal extern static int PeerCollabCancelInvitation(SafeCollabInvite hInvitation);
 internal extern static int PeerCollabGetInvitationResponse(SafeCollabInvite hInvitation,
                                                            out SafeCollabData ppInvitationResponse);
 internal extern static int PeerCollabAsyncInviteEndpoint(  IntPtr pcEndpoint,
                                                             ref PEER_INVITATION pcInvitation,
                                                             SafeWaitHandle hEvent,
                                                             out SafeCollabInvite phInvitation);
 internal extern static int PeerCollabCancelInvitation(SafeCollabInvite hInvitation);
 internal extern static int PeerCollabGetInvitationResponse(SafeCollabInvite hInvitation,
                                                             out SafeCollabData ppInvitationResponse);