You can create an event handler by using the Events TAB of the Properties window.

在属性窗体创建事件处理代码的方法是点击事件标签。

youdao

Your window procedure is the event handler.

窗口过程就是事件处理器。

youdao

The tag shown below creates a Window object whose onx event is wired to the event handler myHandler.

下面显示的标记创建一个Window对象，它的onx事件与事件处理程序myhandler相关联。

youdao

Wherever I went, I needed a constant handler and guide, and the spotty wireless signal often left me stranded the video window on my laptop in Texas frozen as the Robot Rachel in New York went dead.

WSJ: My Life as a Telecommuting Robot