Visual Basic forms are windows. The header area has a caption, the control menu, and the minimize/maximize/close buttons. The the large area of the form is called the client area.

In VB, the basic building block of an application is a form, which is simply a window. You can insert forms into your project in VB IDE, and then you can resize the forms as well as change other properties of the form.

When controls are used, they must be placed in a form. There is a special form called an MDI form. It has a parent form.