Controls placed on a form allow a program to request input from the user.
Adding controls to a form is easy. Simply select a control from the control toolbox and drag it over to the form. When you release your mouse, a copy of the control will be placed on the form. Once the control is on the form, you can change the position and size of the control. You can copy over as many controls as you like.
In addition to the drag method previously mentioned, there are other ways of placing controls on a form.