I have VBScript code which launches QuickTest Professional, executes a series of QTP tests, and emails the results. This works well, but I would prefer to use a language wit
YES, you can use anything that can "do" COM, and that includes C#. Also VB.NET of course.
and Perl, Python, Javascript, and others.
With no help from google, you will have to follow your nose, on how to deal with the interface, but it's not that difficult when you have the existing example. Also your vendor, ideally, will have documented the COM interface for you.