Hi Phil,
What's the nature of the data that you use to communicate with your server (images, tables, ...)?
The attached document lists different formats that are used by Excel 97 that might give you an idea. You could get the list of clipboard formats from MSDN site as well.
Let me know if you have any questions regarding the LabVIEW aspects of it. Good luck with your application!
Shakhina P.
Applications Engineer
NI