Okay,
Simple enough.  Since I've never done this, I'm assuming that, for example a button, the code under MyButton1 (or whatever) is where I would add the functionality for that button?

In formbuilder highlight your button and then go into the events tab top right and enter something in say mouse left up and this will put something on the screen like

YourButtonName:Connect( wx.wxEVT_LEFT_DOWN, function(event)
--implements your function here

event:Skip()
end )
DazTheGas