C++ Add-ins and Windows Vista

Add-ins written in .NET should work in Windows Vista. However, native add-ins written in C++ that register type libraries might encounter problems. The Windows Vista operating system has a limitation that prevents registration of such add-ins. You can read more about this issue in the Microsoft Knowledge Base article "Error message when an application calls the RegisterTypeLib API to register a type library in Windows Vista: "Access denied". The article contains a link to a hotfix download that solves the problem.

If you do not need the type library, the best solution is to remove its registration from the code. Do this in C++ by setting the bRegTypeLib argument to FALSE in CAtlDllModuleT::DllRegisterServer() and CAtlDllModuleT::DLLUnregisterServer():

// DllRegisterServer - Adds entries to the system registry
STDAPI DllRegisterServer(void)
{
  AFX_MANAGE_STATE(AfxGetStaticModuleState());
  // registers object
  HRESULT hr = _AtlModule.DllRegisterServer( FALSE );
  return hr;
}


// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void)
{
  AFX_MANAGE_STATE(AfxGetStaticModuleState());
  HRESULT hr = _AtlModule.DllUnregisterServer( FALSE );
  return hr;
}