Q. Window class, onShow/2, defines (Solved)
1. is executed when a window is becom- ing visible or is being hidden
2. when a window is being disabled or en- abled this event is executed
3. this event is executed when the user switches to another window of the same application
4. when a window receives the keyboard focus this event is executed
- a. is executed when a window is becom- ing visible or is being hidden