Any HTML event that could lend itself to an onscreen keyboard in AIR?

Still tinkering with AIR & have a rough proof of concept of a custom web-browser (using HTML objects to display internet-based HTML websites). This works fine but we’re now looking into bringing a touch-screen keyboard to the mix for use on TabletPC and trying to determine if we can do so in-AIR or if we’re forced to use a native OS application (e.g. WinXP Tablet Edition’s onscreen accessibility keyboard EXE).

To do it in-AIR, I see the need to detect when any field within the HTML pane (including possibly HTML form input fields or embedded SWF-based forms) gets Focus. But I don’t think this is possible given the limited reach of the HTML Events accessible by handlers in AIR, right? Seems doable if AIR contains no HTML objects (only native flash textfields etc) but not if it has any nested HTML objects, right?

Just wanted to confirm whether I’m stuck with an alternate 3rd party App (which AIR couldn’t launch if it wanted to, due to security limitations, right?)

Thanks!