The process of adding the COM references should generate some interop DLLs -- shim DLLs that box up the COM calls for you.  SAS ships these interop DLLs with SAS Enterprise Guide and SAS Add-In for Microsoft Office and the client itself.  Examples:   "C:\Program Files\SASHome\x86\Integration Technologies\SASOLAPInterop.dll" "C:\Program Files\SASHome\x86\Integration Technologies\SASOManInterop.dll" "C:\Program Files\SASHome\x86\Integration Technologies\SASOMIInterop.dll" "C:\Program Files\SASHome\x86\Integration Technologies\SASInterop.dll" It's easiest to simply reference those in your .NET project.  There are CHM files in the IntTech directory that document many of the APIs. ... View more