"WINC.GOH"

@importMessage MetaWindowMessages, void MSG_META_RAW_UNIV_ENTER();
@importMessage MetaWindowMessages, void MSG_META_RAW_UNIV_LEAVE();

should read

@importMessage MetaWindowMessages,
void MSG_META_RAW_UNIV_ENTER(optr inputObj=cx:dx, WindowHandle ptrWin=bp);
@importMessage MetaWindowMessages,
void MSG_META_RAW_UNIV_LEAVE(optr inputObj=cx:dx, WindowHandle ptrWin=bp);

Instead of altering the header file you can also use an alias definition in your own header file:
@alias (MSG_META_RAW_UNIV_ENTER) void MSG_RAW_UNIV_ENTER
(optr inputObj = cx:dx, WindowHandle ptrWin = bp);
@alias (MSG_META_RAW_UNIV_LEAVE) void MSG_RAW_UNIV_LEAVE
(optr inputObj = cx:dx, WindowHandle ptrWin = bp);