Lock Screen or Somthing

I remember from a long time ago there was an AppleScript command that didn’t show what the Finder was doing. For example, I have an AS that duplicates a file. Even though it’s running in the background (I don’t activate it) it’s still visible. Does anyone remember what that command is?

Help us by telling us the “it” that’s running in “Even though it’s running in the background (I don’t activate it) it’s…”