I built a C# application with WPF on Visual Studio 2012 that uses C++ DLL and targets .NET4.5. I have two projects running, one for the C# project and the other for C++ DLL project. I released both projects into a folder that has a .exe for C# and a .dll for C++ in the same folder.

I run them on my machine where they were developed and everything works fine. I run the .exe in other machines and it throws this exception:

System.DllNotFoundException: Unable to load DLL

It's not recognizing the DLL that is in the same folder.

I tried many things and nothing seems to work. I followed the solution in this post but nothing worked.

The Dev and Target machine are identical. In Dev, Visual Studio 2012 is installed, but that's the only difference.

Code:

C#:

[DllImport(@"Wireless.dll", EntryPoint = "?cert_exists@certificate@CertFuncs@@SAHHPBD@Z", CallingConvention = CallingConvention.Cdecl)]
    static extern int cert_exists(int store, [MarshalAs(UnmanagedType.LPTStr)]string cert_str);

C++:

static int __declspec(dllexport) cert_exists(int type, LPCSTR cert_str);

Update:

If I install Visual Studio 2012 on the target machine, everything works fine. If I remove it, the application crashes again. Any ideas on what VS is adding that can make the application work?

c# windows dll
Edit
Report