Microsoft Visual Basic 2010 Step by Step eBook

390 Part III Designing the User Interface

10. Click the Set Opacity button.

Notice how you can see through the form, as shown here:

11. Click the Restore button.

The transparency effect is removed.

12. When you’re done testing the transparency effect, click the Close button to quit the
    program.
    The program stops, and the development environment returns.

Chapter 15 Quick Reference

To Do This

Create lines or shapes

on a form

Use methods in the System.Drawing.Graphics namespace. For example,

the following program statements draw a red ellipse on the form:

Dim GraphicsFun As Graphics

GraphicsFun = Me.CreateGraphics

Dim PenColor As New Pen(System.Drawing.Color.Red)

GraphicsFun.DrawEllipse(PenColor, 10, 120, 200, 160)

Create lines or shapes

that persist on the form

during window redraws

Place the graphics methods in the Paint event procedure for the form.