EventHandler is a delegate for a function that takes an Object (the sender) and eventargs.

这里EventHandler是某个函数的委托，该函数带有参数：Object(也就是sender)和eventargs。

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This latter feature of using EventHandler is less of an issue with the other versions of create .

使用EventHandler的另一个特点是对于其他版本的create来说，很少出现问题。

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Listing 3 duplicates the earlier button selection example shown in Figure 1, using an EventHandler.

清单3重复了前面图1中的按钮选择例子，使用了一个EventHandler。

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