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BREW提供了多组不同功能对象（接口）和功能，这些对象和功能统称为服务，这些服务包括：

在使用一个接口之前，必须首先使用ISHELL_CreateInstance()接口函数创建接口实例。IShell的接口指针是通过调用ISHELL_CreateInstance()接口的当前应用程序，或接口的入口函数传递进来的，不需要创建。

创建实例后，这个接口实例的指针将通过ISHELL_CreateInstance()方法传递回来。对于一些特定的接口不是通过这个方法创建的，而是通过其他方法直接返回的，如IImage接口就是通过ISHELL_LoadImage()方法获得的。

Format Only Edited LinesThe "Save Actions" is one of my favorite features in Eclipse 3.3 (read my original post about it). In Eclipse 3.4 there are several improvements including some new formatting features. One of the complaints against the Save Actions feature was that it will change the entire file, thus, making it very hard to compare to previous revisions when using a source control. It can become very annoying if some team members use it and some don't.For that purpose there's a new feature which allows changing just the edited lines, keeping the rest of the file intact. I highly recommend using the Save Actions feature. It is inactive by default, so go ahead and activate it.

A gotcha is a nasty surprise in the Java language or the standard libraries.