Get parameter value from DLL function

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Hi all,

Is there any software to get the parameter on function available in a DLL? I've tried Depends, but it's only list the function that available in the API. I have the documentation of the DLL, but some of the function is not listed on the manual and I need to use it to send the Pointer to get the return value from the API.

I also tried PE Explorer but no success. I don't know what to do. Try to search for the software about 1 month. FYI, my intention is to get the function parameter require to call the API, not reverse engineering.

Posted 19-Dec-13 21:19pm

Luiey Ichigo

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Sergey Alexandrovich Kryukov 20-Dec-13 3:44am

Why?!
—SA

OriginalGriff 20-Dec-13 4:00am

Why? Simple I assume: he has a DLL but not the source and needs to interface with it. Without the source or any function documentation he has no idea what parameters are needed.

Sergey Alexandrovich Kryukov 20-Dec-13 4:04am

I guess your assumption could be correct... Right, it would be a bad idea to work without documentation. This is not a .NET assembly... However, even the native DLL can be reverse-engineered, but this is not a pleasant or fruitful work. :-)
—SA

OriginalGriff 20-Dec-13 4:21am

Yeah, I've been in that place: someone leaves and you have to interface to his code...now where did he put the source...oh sh*t...

Sergey Alexandrovich Kryukov 20-Dec-13 4:27am

I don't know if you knew that bad joke which ends with the reply like "It's a pleasure to chat with the one who visited so many different places...". :-)
—SA

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OriginalGriff · Answer 1 · 2013-12-19T21:39:00

Solution 1

For a native DLL file, there is no way I know of to extract the information, short of a full decompile as the information simply isn't stored in the file - just the number of bytes the parameters take up but not what type they are. If you think about it, it makes sense that it would be that way: the DLL is a fully compiled "machine code" executable, and it does not know about the higher level constructs that the original parameters were made up of.

Sorry - but you need the documentation.

Posted 19-Dec-13 21:39pm

OriginalGriff

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Luiey Ichigo 20-Dec-13 3:46am

Native is meaning the final DLL? This is the DLL use to operate a device. From your explanation, the answer is no. Thank you Griff

OriginalGriff 20-Dec-13 3:59am

Native means it is a from a Native build, rather than a .NET managed build - which produces an IL DLL Assembly file which does contain the information (and can be converted back to C# or VB very easily). Native DLL's don't do that, so the answer is "No" I'm afraid!