| Name | Type | Defined Value | 
 | None | Not occurs | WSEV_NONE | 
 | INITIALIZE | When the instance is initilized. | WSEV_INITIALIZE | 
 | DELETE | When the instance is released. | WSEV_DELETE | 
 | VALUE-CH | When the value is changed. | WSEV_VALUE_CH | 
 | VISIBLE-CH | When the WSNvis property is changed. | WSEV_VISIBLE_CH | 
 | PARENT-VISIBLE-CH | When the visible property of the parent instance is changed. | WSEV_PARENT_VISIBLE_CH | 
 | EXPOSE | When the instance is exposed. | WSEV_EXPOSE | 
 | RESIZE | When the instance is resized. | WSEV_RESIZE | 
 | MOUSE-IN | When the mouse pointer comes into the area | WSEV_MOUSE_IN | 
 | MOUSE-OUT | When the mouse pointer goes out of the area. | WSEV_MOUSE_OUT | 
 | MOUSE-PRESS | When the mouse pointer is pressed. | WSEV_MOUSE_PRESS | 
 | MOUSE-RELEASE | When the mouse pointer is released. | WSEV_MOUSE_RELEASE | 
 | MOUSE-MOVE | When the mouse pointer moves in the area. | WSEV_MOUSE_MOVE |