CascadeButton

Class Pointer:  xmCascadeButtonWidgetClass
Class Name:     XmCascadeButton
Include File:   <Xm/CascadeB.h>
Superclass:     XmLabel
Description:
        Used in menus to create pulldown menu frames.

Resources:
Name                    Type                    Default
---------------------   ---------------------   ------------------------
XmNsubMenuId            XmRMenuWidget           0
XmNCascadePixmap        XmRPrimForegroundPixmap menu_cascade
XmNmappingDelay         XmRInt                  100
XmNshadowThickness      XmRShort                2

Callbacks:
Callback List           Call Data Type          Reason
---------------------   ---------------------   -------------------------
XmNactivateCallback     XmAnyCallbackStruct     XmCR_ACTIVATE
XmNcascadingCallback    XmAnyCallbackStruct     XmCR_CASCADING