Why would you want to do it that way?
How is your program structured?
What makes it "cleaner" to do it with ProcessSystemEvents() as opposed to RunUserInterface() ?
(I believe the effect of the RunUserInterface() call is essentially the same as looping on ProcessSystemEvents() but there may be other stuff it handles in the background I do not know about).
My program is structured so that it is always running in a loop.
However, now that you mention it, I could restructure it like a typical CVI program.