Hi Yohn,
On clicking the column-lable of a browser, the start-search event is triggered . So your code would something like the below
on 'start-search' of <columnname>
open query of browser by <fieldname>.
end.
Only an editable / updateable column of a browse can have the start search event.
I am assuming that you are working on one the GUI versions of Progress.
- Cheers
Sunil.