XmDataFieldGetSelection — A DataField function that
retrieves the value of the primary selection

     #include <Xm/DataF.h>
char * XmDataFieldGetSelection(
Widget widget);

     XmDataFieldGetSelection retrieves the value of the
primary selection. It returns a NULL pointer if no text is
selected in the widget. The application is responsible for
freeing the storage associated with the string by calling

widget    Specifies the DataField widget ID

     For a complete definition of DataField and its
associated resources, see XmDataField(3).

     Returns a character pointer to the string that is
associated with the primary selection.

     XmDataField(3) and XmDataFieldGetSelectionWcs(3).