How to: Add Windows Forms to a Project
Your Windows application may need more than just a main form. The .NET Framework makes it easy to add dialog boxes, startup screens, and other supporting forms.
The dialog boxes and menu commands you see might differ from those described in Help depending on your active settings or edition. To change your settings, choose Import and Export Settings on the Tools menu. For more information, see Visual Studio Settings.
To add a Windows Form that inherits from the Form class
In Solution Explorer, right-click your project, point to Add, and then click Windows Form.
To add a Windows Form that inherits from a previously created form class
In Solution Explorer, right-click your project, point to Add, and then click Inherited Form.
You can also add a Windows Form from the Project menu.