How to capture browser's Find (ctrl-F)

Hi,

Does anyone has an idea of how to capture the browser's ctrl-F in order to override it's behaviour?

I'm looking for something that works like Google spreadSheets - when you click on one of the cells and ctrl-F, you get a customized find box.

I thought it's done using BHO , but it doesn't look like it does.

My ultimate goal is to capture it, and send it to a Flex app for a customized search.

tnx,

-Ilan