xdsGetXmListEntries() - returns the element in the list; this is a simple routine that fetches the elements of an XmList.
XmListYToPos() - a Motif convenience function which takes the y-coordinate of the event and returns its position in the list.
xdsXmStringToString() - converts an XmString to a String.
XmListPosToBounds() - a Motif convenience function which gives the window bounding-box of a particular item in the list. This can be used to work out likely (x,y) coordinates for a click on that element.