Events
The following events are applicable to the COMBO-BOX control:
CMD-DBLCLICK,
CMD-GOTO,
CMD-HELP,
CMD-HELP-MOUSE,
MSG-DRAG,
MSG-DROP,
MSG-END-MENU,
MSG-INIT-MENU,
MSG-MENU-INPUT,
MSG-MOUSE-ENTER,
MSG-MOUSE-EXIT,
MSG-VALIDATE,
NTF-SELCHANGE.