Find the first widget at a given position that has a help topic
PtWidget_t * PtWidgetHelpHit( PtWidget_t *container, PhPoint_t const *pos );
This function finds the first widget inside the given container at the given position that contains a help topic (i.e. Pt_ARG_HELP_TOPIC contains a non-NULL string).
A pointer to the widget found; NULL if none was found.