XmDataFieldSetInsertionPosition — A DataField function that
sets the position of the insertion cursor

     #include <Xm/DataF.h>
void XmDataFieldSetInsertionPosition(
Widget widget,
XmDataPosition position);

     XmDataFieldSetInsertionPosition sets the insertion
cursor position of the DataField widget.  This routine also
calls the widget’s XmNmotionVerifyCallback callbacks if the
insertion cursor position changes.

widget    Specifies the DataField widget ID

position  Specifies the position of the insert cursor. This
          is an integer number of characters from the
          beginning of the text buffer. The first character
          position is 0 (zero).

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