XmWidgetGetDisplayRect — Retrieves display rectangle information for a widget "XmWidgetGetDisplayRect"

XmWidgetGetDisplayRect  returns the width, height and the x and y-coordinates of the upper left corner of
       the display rectangle of the specified widget. The display  rectangle  is  the  smallest  rectangle  that
       encloses either a string or a pixmap.

       If  the  widget  contains  a  string, the return values specify the x and y-coordinates of the upper left
       corner of the display rectangle relative to the origin of the widget and the width and height in pixels.

       In the case of a pixmap, the return values specify the x and y-coordinates of the upper  left  corner  of
       the pixmap relative to the origin, and the width and height of the pixmap in pixels.

       widget    Specifies the widget ID

       displayrect
                 Specifies  a  pointer  to  an  XRectangle structure in which the x and y-coordinates, width and
                 height of the display rectangle are returned

XmWidgetGetDisplayRect — Retrieves display rectangle information for a widget "XmWidgetGetDisplayRect"

XmWidgetGetBaselines(3).

                                                                                       XmWidgetGetDisplayRect(3)

       Returns True if the specified widget has an associated display rectangle; otherwise, returns False.

       #include <Xm/Xm.h>
       BooleanXmWidgetGetDisplayRect(
       Widgetwidget,
       XRectangle*displayrect);