| DirectX SDK | 
DirectPlay generates the DPMSG_DELETEGROUPFROMGROUP structure and sends it to every player when a group is removed from a group. Note that this structure is identical to DPMSG_ADDGROUPTOGROUP.
typedef struct{
    DWORD    dwType;
    DPID     dpIdParentGroup;
    DPID     dpIdGroup;
} DPMSG_ADDGROUPTOGROUP, FAR *LPDPMSG_ADDGROUPTOGROUP;
typedef DPMSG_ADDGROUPTOGROUP DPMSG_DELETEGROUPFROMGROUP;
  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.