XmDataFieldSetAddMode controls whether or not the DataField widget is in Add
mode. When the widget is in Add mode, the insert cursor can be moved
without disturbing the primary selection.
widget
Specifies the DataField widget ID
state
Specifies whether or not the widget is in Add mode. A value of True
turns on Add mode; a value of False turns off Add mode.
For a complete definition of DataField and its associated resources, see
XmDataField(3).