XUI 是一个高效、灵活易用的 Windows UI 库，使用 C++ 编写，基于 ATL 库。
- Layout by XML.
- Full basic controls: Static, Button, Edit, List (by aggregation), Tree, Animation, Scroll Frame, Dock, etc.
- Control aggregation is fully supported.
- Flexible I: You can make controls look like whatever you want it to be.
- Flexible II: Custom controls are very easy to build and integrate. Basic controls supplied and aggregation support makes it even easier.
- We use layered windows as host windows, so, transparency of host windows is fully supported.
- It is evolving and is regularly updated.