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POMonitoring application calls to DLL
 

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    <p>In short: I want to monitor selected calls from an application to a DLL.</p> <p>We have an old VB6 application for which we lost the source code (the company wasn't using source control back then..). This application uses a 3rd party DLL.</p> <p>I want to use this DLL in a new C++ application. Unfortunately the DLL API is only partially documented, so I don't know how to call some functions. I do have the functions signature.</p> <p>Since the VB6 application uses this DLL, I want to see how it calls several functions. So far I've tried or looked at -</p> <ol> <li><a href="http://www.codeproject.com/KB/DLL/apihijack.aspx" rel="noreferrer">APIHijack</a> - requires me to write C++ code for each function. Since I only need to log the values, it seems like an overkill.</li> <li><a href="http://www.codeplex.com/easyhook" rel="noreferrer">EasyHook</a> - same as 1, but allows writing in the code in .NET language.</li> <li><a href="http://www.ollydbg.de/" rel="noreferrer">OllyDbg</a> with <a href="http://oss.coresecurity.com/uhooker/doc/index.html" rel="noreferrer">uHooker</a> - I still have to write code for each function, this time in Python. Also, I have to do many conversions in Python using the <code>struct</code> module, since most functions pass values using pointers.</li> </ol> <p>Since I only need to log functions parameters I want a simple solution. Is there any automated tool, for which I could tell which functions to monitor and their signature, and then get a detailed log file?</p>
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