Control unless you know about GCN or are willing to learn.</P>
<P>
When declaring your RulerShowControl, you may choose a GCN list which the control will work with. The default list is MANUFACTURER_ID_GEOWORKS:<BR>
GAGCNLT_DISPLAY_OBJECTS_WITH_RULERS. However, you may change this to be any list you like. You must also specify a message which some object will respond to.</P>
<P>
Some object which will be usable when the user has access to the RulerShowControl should be on the control's GCN list. This object 