在Win32应用程序中捕获DLL依赖项

Question

How can I catch a missing DLL in a dependent DLL?

For example: Application is loading a DLL A.

DLL A is loading DLL B.

So if DLL B is not available, application just shows me: DLL A not found.

Any hints where I could find a solution?

At the moment I use dependency-walker to solve this issue, but I need something inside the application, so that the customers must not launch the external tool whenever a DLL is missing.

Answer 1

我尚不清楚您的用例在哪里，但是您的应用程序无法在启动“外部工具”之前调用LoadLibrary来检查DLL是否可用，并且如果失败，则报告缺少DLL？

Answer 2

You could explicitly load the DLL. You'll get an error/exception if you have a missing dependency.

Perhaps you can statically compile the code in the DLL so the problem is eliminated?

If you're fighting with " DLL Hell " you might also be able to place the DLL's in the file system so windows will load the DLL's you want.

Answer 3

You can parse IAT and implement an algorithm similar with the one used by LoadLibrary to check if dll wil be found. A start in implementing this is ImageNtHeader