Winform類型的Dock Panel,類似VS開發環境的Dock Panel-Winform type Dock Panel, similar to VS development environment Dock Panel

很好用的开源的三方控件，实现了MDI窗口，窗口可以浮动，拖拽，效果很不错-A very good three-way with open source control, achieved a MDI window, the window can be floating, drag and drop, the effect is very good