public static extern IntPtr FLAG_STGMEDIUM_UserMarshal(ref uint param0, IntPtr param1, ref FLAG_STGMEDIUM param2);
public static extern void FLAG_STGMEDIUM_UserFree(ref uint param0, ref FLAG_STGMEDIUM param1);
public static extern uint FLAG_STGMEDIUM_UserSize(ref uint param0, uint param1, ref FLAG_STGMEDIUM param2);