Even though you can use SetWindowLong_/GetWindowLong_ to accomplish my suggestions. it would be nice to be able to change
already created gadgets and windows flags in a generic way without resolving to api. i.e..(Cross platform).
My wishes, if possible are: (Just to add to an excellent programming language)

SetWindowFlags, SetGadgetFlags and thereby do style changes on the fly.
A wish for a new gadget would be: RubberBandGadget ~ A simplified selection gadget.
Best regards
Peter