Xmgettabgroup returns the widget id of a tab group "xmgettabgroup" "traversal functions" "xmgettabgroup"
#include <Xm/Xm.h> Widget XmGetTabGroup( Widget widget);
XmGetTabGroup returns the widget ID of the tab group that contains the specified widget.
Specifies a widget ID within a tab group
Returns the widget ID of a tab group or shell, determined as follows:
If widget is a tab group or shell, returns widget
If neither widget nor any ancestor up to the nearest shell is a tab group, returns the nearest ancestor of widget that is a shell
Otherwise, returns the nearest ancestor of widget that is a tab group