Keeping focus in modeless form

I'm trying to figure a way to have a form with Showmodal=false and still
let me enter text in a textbox. I found a reference to
AcFocusCtrl Class from Additional Controls. But I get a "Class not
registered" error when I try to add it to my form. I tried to select
simply AcFocusCtrl but when I try to add that to my form, Acad crashes.
I'm using Acad2004.
What's the trick?

-mjm

 

I don't believe that control was updated to function in 2K4.

Joe