If you have figured it all out, I hope you want to write a HaskellWiki page about it.
If I pass the gating, I ll publish a kind some HowTo on the differente techniques I dig out already started with this one, where I published my finding in the answer: http://stackoverflow.com/questions/15867654/wx-haskell-drag-and-drop-example
As no one else has responded so far, I think you are in uncharted territory; wxHaskell is huge and there are not many applications using it.
good point. ! do we have some kind of census of application that wrok or still work with wxhaskell ? any interest in (me) doing this ? (who know some toosl to do this, a la doodle ?) and by extension : btw how many people are really active and resonably knowleadeable these day ? (e.g. "senior") Are Eric ? Jeremy ? atzedijkstra ? yourself ? still active on wx. and are you using it yourself HenkJan ? is : https://github.com/atzedijkstra/wxHaskell the head dev for these day ? i.e. who is the maintainer ? ( Sorry for all these questions, but I am just discovering the field :-)