Handling system and user-input events.

• 事件处理

Handling system and user-input events.的用法和样例：

例句

1. Complex changes are done in the form's event handling methods.
   复杂的数据交互在窗体的事件处理方法中实现。
2. Event handling provides a great deal of flexibility.
   事件处理提供了大量灵活性。