Writing a plugin for a Windows application using Visual Studio?

You had the smarts to define the application’s exe as the debug executable in Visual Studio project options?

While reading the output, you saw the error from the post’s title?

First-chance exception at 
 (ntdll.dll) in .exe: 0xC0000139: Entry Point Not Found

You’ve probably got a classic case of app-uses-one-version-of-dll-while-one-of-my-plugin’s-dependencies-wants-another-one. In my case, I had to replace zlib1.dll in the app with the one that came with Igor Zlatković’s Win32 builds of libxml2, xmlsec, etc.

Read a bit more about the error, including different causes.

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via blog.vucica.net