Getting "top level" stack

[James Witte]

  I want to make a palette with a button to get the name of the top-level
stack (i.e. the one that's active when the palette's button is clikced)
I'm currently trying to use line 1 of the openStacks to do this, but
when I click on the button, the palette itself activates.  Is there any
way to keep track of the top stack other than inserting an openStack
message into the message chain?

Jim Witte
jswitte at bloomington.in.us