现在的即时翻译软件种类很多，使用方法也各有千秋，但它们大都有一个 共同的特点：鼠标指到哪儿，就翻译它下面的单词。这大大地方便了用户，但是 从一个编程人员的角度来看就不那么轻松了。因为没有一个方便的函数 类似”GetWordUnderMouse()”可以得到鼠标下面的单词，那么这些软件是怎么 做的呢？经常在BBS和mailing list里看到和我同样困惑的问着相同问题的网友们。-Now in the matket the immediatly translation software has many sorts.The method of using is also differently.But they have a feature in common:it translate the word when the mouse pointer points a word.This founction make things conwenient for the consumer,but through the angle of a programmer it is not so easyly.In the reason of not having a conveniet founction just as "GetWordUnderMouse()"that can get the word undermouse,then how did these software product?I ofen encoutered the web funs who had the same question as me in the BBS or maling list.