title: COM DLL c++ not visible in Object Viewer
body: <p>i have create a c++ DLL with COM interface with Visual Studio 2013.
  The DLL get's installed along with registration. 
  In the Ole Object Viewer, i can see typelibrary of this DLL with all
  exported functions.
  regsvr32 completes without any error.</p>
  
  <p>Just within C# i can't use, because creation fails with error 0x80040154 -
  class not found or not registered.</p>
  
  <p>It is not a platform issue. The 64bit version is in system32 and the 32bit
  version in syswow64 and they are registered there and typelibary information
  in OLE Object Viewer confirms this.</p>
  
  <p>But the class is not listed in the OLE Object Viewer  tree.</p>
  
  <p>Habe noe idea what's missing or wrong.</p>
  
  <p>More over, i have a simliar VC++ project and this COM/DLL can be seen 
  in the  view in the OLE Object viewer. It is compiled, linked
  and installed in exactly the same manner.</p>
  
  <p>I already compared all Compiler, Linker and MIDL settings, checked the .idl
  file in the projects, the .rgs files... all seems to be the same, except
  different names and guids.</p>
  
  <p>So it is really strange: One is shown as COM object in the  tree
  of OLE Object viewer and can be used in C# program, the other not.</p>
  
  <p>Please note: There is no compiler error in C# project using this DLL/COM.
  There is a runtime error on creation 0x80040154.</p>
  
  <p>Summary: i have to COM/DLL, both visual studion projects, deployed in the same
  manner, the one can be seen in the OLE object tree and can be used in C#, the other not.</p>
  
  <p>Are there any key points i could check and which are required for a successfull
  listing as OLE COM object ?</p>
  
  <p>PS: The only difference is the MSIL compiler version indicated in the type library view: The good COM/DLL has MSIL 7.xxx the bad one 8.xxx
  but i don't know where at all to selected MSIL compiler. Both DLL/COM are built
  by VS2013</p>