How do I decompile a .dll file?

The answer depends on what language the DLL was written in. If it was a .NET language then, as pointed out, you can use .NET Reflector. If it’s the older Visual Basic (pre-.NET), then the DLL is compiled as what’s called p-code and there are a few options for doing some variations on decompiling. Finally, if … Read more

Unexplained crashes related to ntdll.dll

I have an application that I’ve written that crashes intermittently, but I’m unable to capture an exception at the application layer. I always get an entry in the event log but doesn’t give me much info: As you can see, I get this: Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll. I’m not sure what that is or how … Read more

What exactly are DLL files, and how do they work?

What is a DLL? Dynamic Link Libraries (DLL)s are like EXEs but they are not directly executable. They are similar to .so files in Linux/Unix. That is to say, DLLs are MS’s implementation of shared libraries. DLLs are so much like an EXE that the file format itself is the same. Both EXE and DLLs … Read more

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