acCmdZoomBox - no idea what it does, I also looked into it and couldn't find anything of worth. If that changes, I'll let you know.
Listing of constants - search help on the RunCommand function, there is a link to all of the constants access has, documentation of each individual one is slim. There are a couple web sites that are trying to document them, you might try looking for them on google.
Joe Miller
joe.miller@flotech.net