#include <Xm/Xm.h> void XmRemoveTabGroup( Widget tab_group);
This function is obsolete and its behavior is replaced by setting XmNnavigationType to XmNONE. XmRemoveTabGroup removes a widget from the list of tab groups associated with a particular widget hierarchy and sets the widget's XmNnavigationType to XmNONE.
XmAddTabGroup(3), XmManager(3), and XmPrimitive(3).