Thank you both for your responses. I ran across this thread:
http://www.mmo-champion.com/threads/...e-when-tabbing
And post #7 suggests using an AutoHotKey script to simulated a "borderless window" mode. Not sure that would still work in a Windows 10 environment (or on any other OS for that matter) but was thinking of maybe trying it later tonight. I'll check back in after I give it a shot.