<HTML>Sorry, I have to answer my own post. I finally found the command: RUNDLL32 USER32.DLL,LockWorkStation
I put RUNDLL32 as the file in a "Run Program" sequence with USER32.DLL,LockWorkStation as the argument and mapped it to the L gesture in Global. Works. Quick lockup.
I found this, if you can believe, at a DOS batch web site: www.robvanderwoude.com/rundll.html</HTML>