Microsoft Visual Basic 2010 Step by Step eBook

Chapter 8 Debugging Visual Basic Programs 225

Remove a breakpoint

1. In the Code Editor, click the red circle associated with the breakpoint in the Margin
   Indicator bar.
   The breakpoint disappears. That’s all there is to it! But note that if you have more
   than one breakpoint in a program, you can remove them all by clicking the Delete All
   Breakpoints command on the Debug menu. Visual Studio saves breakpoints with your
   project, so it’s important to know how to remove them; otherwise, they’ll still be in
   your program, even if you close Visual Studio and restart it!


2. Click the Stop Debugging button on the Standard toolbar.

The Debug Test program ends.

3. On the View menu, point to Toolbars, and then click Debug.

The Debug toolbar closes.

You’ve learned the fundamental techniques of debugging Visual Basic programs with Visual

Studio. Place a bookmark in this chapter so that you can return to it as you encounter

problems later in the book. In the next chapter, you’ll learn how to handle run-time errors by

using structured error handling techniques.

Chapter 8 Quick Reference

To Do This

Display the Debug toolbar On the View menu, point to Toolbars, and then click Debug.

Set a breakpoint In the Code Editor, click in the Margin Indicator bar next to the

statement where you want to stop program execution. When the

compiler reaches the breakpoint, it will enter debugging mode.

or

Place a Stop statement in the program code where you want to

enter debugging mode.

Execute one line of code

in the Code Editor

Click the Step Into button on the Standard toolbar.

Examine a variable,

a property, or an expression

in the Code Editor

In debugging mode, select the value in the Code Editor, and then

hold the pointer over it.

Use the Autos window to

examine a variable on the

current or previous line

In debugging mode, click the Debug menu, point to Windows, and

then click Autos.

Add a variable, a property,

or an expression to a Watch

window

In debugging mode, select the value in the Code Editor, right-click

the value, and then click Add Watch.