1. Create a WinForm project. A WinForm Form1 is generated by default. 2. Reference-> Add reference-> browse-> weiFenLuo. winFormsUI. Docking. dll. 3. Set the Form1 form attribute IsMdiContainer: True. 4. Right-click the Toolkit and choose items>. net components> browse> weiFenLuo. winFormsUI. Docking. dll> dockPanel in the Toolkit. 5. Drag the dockPanel to form Form1 and set the Dock attribute. I set Fill. Dock form: 1. Create a WinForm form Form2. 2. Modify the form in the code to inherit from DockContent. Using WeifenLuo. WinFormsUI. Docking; public partial class Form2: DockContent 3. display the dock form in the main form Form1. Private void Form1_Load (object sender, EventArgs e) {Form2 form2 = new Form2 (); form2.Show(this.doc kPanel1);} If dockPanel is nested in another container control (such as panel ), set the DocumentStyle attribute of dockPanel to DockingWindow/DockingSdi.