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>And now I am able to access the methods and properties of the Catalog interface. This would then be repeated for each interface. I don't think there is a benefit to using the ..EX version over the "normal" version -- the help file indicates that the CREATEOBJECTEX is for accessing a remote server which is not the case for me since the activex type lib is installed on the local PC.

There's more to it than accessing COM objects on a remote computer. See Remarks section for details.