Okay, so I did do that, and it worked, but I for whatever reason decided to try it in wxSmith, so it's all set up there.
The problem now is getting wxSmith to generate the happy callback functions. I enabled the option that sends a signal when the user presses enter in the input TextCtrl, so I should at least get something for that.
How do I get wxSmith to generate code, or if it doesn't, is there documentation for this sort of thing that I can look at somewhere?