Trapping other application's events

[Mark Campillo]

Is it possible to have events from the running application sent your
application?  For example, could keystrokes from the current application
also be sent to your application?  Also, is it possible to display a list,
or other UI element, on the currently running application from your
application?  I know this kind of functionality is available with
HackMaster, but can it be done using standard SDK APIs?

Thanks,

mark