SolidWorks API: Loading/getting Simulation (CosmosWorks) object, failure?

As the SolidWorks 2009 Simulation API help states, the typical use of Cosmos Works begins by creating an instance of the ICosmosWorks class:

private object iCosWorks = null;
iCosWorks = (ICosmosWorks) SwApp.GetAddInObject(“CosmosWorks.CosmosWorks”);

However if you try the code above, you will find that the iCosWorks object is always null .

Where does the string (“CosmosWorks.CosmosWorks”) come from, and how is it named? It is not very clear in the documentation: The help manual tells us that the signature of this function is:

virtual object GetAddInObject(
   string clsid          
)
"This method also accepts the ProgID, both version independent and version dependent, for clsid."

So I wonder, the ProgID has updated in the new 2009 API, while the documentation falls behind and remain intact. What lazy engineers! It costs me much time...

So I tried to get the string by myself. In SolidWorks 2009, the Simulation DLL is ‘cosworks.dll’,

• Search the registry with this dll as the keyword
• The ProgID as well as VerionIndependentProgID can be found.

Now, retry the following code:

iCosWorks = (ICosmosWorks) SwApp.GetAddInObject(“SldWorks.Simulation.2“); or
iCosWorks = (ICosmosWorks) SwApp.GetAddInObject(“SldWorks.Simulation“);
Debug.Assert(iCosWorks != null);

It works now!