title: Visual Studio 2012 C# - Importing a DLL
body: <p>I am actually trying to use a DLL on a C# project. The problem is, whenever I try to import it in my project by adding it as a reference, I get this error message :</p>
  
  <blockquote>
    <p>A reference to "C:\FilePath\LnkEMP.dll" could not be added. <br/>
    Check that the file is an assembly or a valid COM component</p>
  </blockquote>
  
  <p>The library is "LnkEMP.dll", used for a program called Expert/M Plus. I need this library to interract with this program. <br />
  I think that this DLL is made in C++, which could be one of the reason that my C# project can't load it. <br />
  I tried to make a C++ Library and importing it, but this time I had another error message :</p>
  
  <blockquote>
    <p>A reference to "C:\FilePath\LnkEMP.dll" could not be added,<br/>
    because it is not an assembly .NET, or not a registered ActiveX control</p>
  </blockquote>
  
  <p>Do you have any idea of what should I do to get it work ?</p>