用于开发皮肤应用程序的最佳框架是什么？

I need to develop an application for windows, and it needs to support skins. I am looking for a framework to use. I would much prefer to not use QT, because of it's licensing - GPL is not an option for me, and it is otherwise to expensive (and I can't put off developing this application till March, when QT is supposed to go LGPL).I need to develop an application for windows, a