XmDropSiteRegistered — A Drag and Drop function that determines if a drop site has been registered

XmDropSiteRegistered  determines  if  the  specified widget has a drop site registered. If a drop site is
       registered, this function returns True.

       widget    Specifies the ID of the widget being queried.

       For a complete definition of DropSite and its associated resources, see XmDropSite(3).

XmDropSiteRegistered  —  A  Drag  and  Drop  function  that determines if a drop site has been registered
       "XmDropSiteRegistered"  "Drag   and   Drop   functions"   "XmDropSiteRegistered"   "register   functions"
       "XmDropSiteRegistered"

XmDisplay(3),  XmDropSite(3),  XmDropSiteEndUpdate(3),   XmDropSiteStartUpdate(3),   XmDropSiteUpdate(3),
       XmDropSiteUnregister(3), and XmScreen(3).

                                                                                         XmDropSiteRegistered(3)

       If the widget is not a registered drop site, this function returns False. Otherwise, it returns True.

       #include <Xm/DragDrop.h>
       BooleanXmDropSiteRegistered(
       Widgetwidget);