Did you try exactly this?
#xtranslate hb_HHasKey( [<x,...>] ) => HHasKey( <x> )
#xtranslate hb_ValToExp( [<x,...>] ) => ValToPrgExp( <x> )
#include "Fivewin.ch"
FUNCTION MAIN()
HB_HHASKEY()
HB_VALTOEXP()
RETURN NILIt should compile fine.