Setp1 : Create a Windows Forms Control Library Project.
Step2 : Add a new UserControl in this project.
Step 3 : Drag a control to the User Control. Ex. I create a login from in user control.
Step 4 : Add a new Windows Forms Application.
Step 5 : Now you can see in the toolbox that you have a login control. Drag this control onto your from.
Step 6 : Now run the Windows From Application.