DLL包装和DLL之间的区别 [英] difference between DLL wrapper and DLL

问题描述

我不知道什么是DLL包装。有人可以解释我吗

1）什么是DLL包装？

2）它与DLL有什么不同？

3）如何使用？ / p>

感谢和关心，

解决方案

它如下所示：

• 应用程序加载foo.dll




• foo.dll执行函数并向应用程序返回值

会发生：

• 应用程序加载foo.dll（不知道或关心foo.dll实际上是包装器，已重命名为foo_original.dll）


• foo.dll加载foo_original.dll


• foo.dll中的应用程序调用函数


• foo.dll将调用转发到foo_original.dll


• foo_original.dll执行函数并将值返回foo.dll


• foo。 dll向应用程序返回值

这样，DLL包装器就有机会检查/记录应用程序对原始DLL的所有调用，以及修改在两者之间传递的数据的机会。

I have no idea what is DLL wrapper. Could someone please explain me
1) what is DLL wrapper?
2) how it is different from DLL ?
3) how to use it?

Thanks and regards,

解决方案

When a program uses a DLL, it goes like this:

• Application loads foo.dll
• Application calls function in foo.dll
• foo.dll executes function and returns value to application

With a wrapper DLL, this would happen:

• Application loads foo.dll (not knowing or caring that foo.dll is in fact the wrapper, and the original DLL has been renamed to foo_original.dll)
• foo.dll loads foo_original.dll
• Application calls function in foo.dll
• foo.dll forwards the call to foo_original.dll
• foo_original.dll executes function and returns value to foo.dll
• foo.dll returns value to application

This gives the DLL wrapper an opportunity to inspect/log all calls made by the application to the original DLL, as well as a chance to modify data being passed between the two.

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