Events
The following events are applicable to the TAB-CONTROL control: 
CMD-HELP, 
CMD-HELP-MOUSE, 
CMD-TABCHANGED, 
MSG-END-MENU, 
MSG-INIT-MENU, 
MSG-MENU-INPUT, 
MSG-MOUSE-CLICKED, 
MSG-MOUSE-DBLCLICK, 
MSG-MOUSE-ENTER, 
MSG-MOUSE-EXIT, 
MSG-VALIDATE.