I'll cross that bridge when I get to it.

Probably there'll be an event handler the user can set up that will get the URL to the captcha image, and the calling program can do with it what it wants (e.g. get it with LWP and then: display it in a GUI for the user to answer, or feed it to an app that can try to decode it automatically, etc.) and then call a method to send the answer back to the server.