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Designing an Interface

It's generally best to design the user interface of a form and then add the code behind the interface that makes the form functional. The user interface for your Picture Viewer program will consist of a View Picture button, a Close button, and a PictureBox in which to display a picture.

Adding a Visible Control to a Form

Start by adding a Button control to the form. Do this by double-clicking the Button item in the toolbox. C# then creates a new button and places it in the upper-left corner of the form (see Figure 1.7).

Figure 1.7. When you double-click a control in the toolbox, the control is added to the upper-left corner of the form.

Using the Properties window, set the button's properties as follows (note that you may ...