public static extern void IPReallocNewTypeObject(IPObjectStruct *PObj, IPObjStructType ObjType);
public static extern IPObjectStruct *IPAllocObject(byte *Name, IPObjStructType ObjType, IPObjectStruct *Pnext);
public static extern int UserTopoNumOfEntOfType(UserTopoUnstrctGeomStruct *Ud, IPObjStructType Type);