Okay I seem to have solved it. It doesn't seem a very nice solution to me, but it works at least.
So I retrieve the COM method into an OLEObject I them put each property into the desired structure like so:
ltr_sharepoint_site lstr_site
OLEOBject lole
lole = CREATE OLEObject
lole = iole_xml.DoStuff()
// Extract the results from the OLEObject into my structure
lstr_site.sb_is_connected = lole.IsConnected
lstr_site.ss_url = lole.URL
It requires the PB programmer to know the names of the properties in the C# code which is a shame, it would be nice to just assign like so lstr_site = iole_xml.DoStuff() but I can live with it Image may be NSFW.
Clik here to view.
