| DirectX SDK | 
The DPMSG_SETGROUPOWNER structure is generated by DirectPlay when the owner of a group has changed. Group ownership can be changed by the current owner leaving the session, by a call to IDirectPlay4::SetGroupOwner, or, arbitrarily, by the lobby server in a lobby session.
typedef struct{
  DWORD   dwType;
  DPID    idGroup;
  DPID    idNewOwner;
  DPID    idOldOwner;
} DPMSG_SETGROUPOWNER, FAR *LPDPMSG_SETGROUPOWNER;
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dplay.h.