This isn't exactly using the simple find command, but it seems to work just the same:
Take a look at some of the definitions in: epic\packages\find.acl
For what it's worth, I took a look at the epic\lib\dialogs\findtag.xml & epic\packages\main\_findtagdlg.acl to see how Epic itself was doing the tag find (from the Find -> Find Tag/Attribute menu). From there it was pretty much just using the same call.
Not sure if that's what you're looking for... it's pretty specialized to tag/attribute searches.