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Can we decompile a.exe or.dll file as 100%? Also sometimes seems some mistakes on somewhere (like mainfrm.cs), how can we fix that? What is the best.NET decompiler? Or What would you prefer? I have an old DLL that stopped working (log2vis.dll) and I want to look inside it to see what objects it uses. The DLL was written in C (not.NET). Is there a tool that will decompile/disassemble.

I have an old DLL that stopped working (log2vis.dll) and I want to look inside it to see what objects it uses.
The DLL was written in C++ (not .NET). Is there a tool that will decompile/disassemble C++ files?

Tamara Wijsman

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Lea CohenLea Cohen

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6 Answers

This might be impossible or at least very hard. The DLL's contents don't depend (a lot) on it being written in C++; it's all machine code. That code might have been optimized so a lot of information that was present in the original source code is simply gone.

That said, here is one article that goes through a lot of material about doing this.

unwind

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MalkocogluMalkocoglu

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I think a C++ DLL is a machine code file. Therefore decompiling will only result in assembler code. If you can read that and create C++ from that you're good to go.

Igor Popov

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RvdKRvdK

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There are no decompilers which I know about.W32dasm is good Win32 disassembler.

Peter Mortensen

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SzczepanSzczepan

There really isn't any way of doing this as most of the useful information is discarded in the compilation process. However, you may want to take a look at this site to see if you can find some way of extracting something from the DLL.

anon

Decompile Dotnet Dll

The closest you will ever get to doing such thing is a dissasembler, or debug info (Log2Vis.pdb).

Naim ArnoldNaim Arnold