XmTabStackXYToWidget — A TabStack function that converts a pixel coordinate to the widget ID of the tab

XmTabStackXYToWidget converts an X/Y pixel coordinate in the window if TabStack to the widget ID  of  the
       tab occupying that space.

       widget    Specifies the TabStack widget ID

       x         Specifies X coordinate to convert

       y         Specifies Y coordinate to convert

XmTabStackXYToWidget  —  A TabStack function that converts a pixel coordinate to the widget ID of the tab
       occupying that space "XmTabStackXYToWidget" "TabStack functions" "XmTabStackXYToWidget"

XmTabStack(3).

                                                                                         XmTabStackXYToWidget(3)

       Returns the widget ID of the tab occurring in the cpecified coordinate.

       #include <Xm/TabStack.h>
       WidgetXmTabStackXYToWidget(
       Widgetwidget,
       intx,inty);