Inserting Debug.Print statements. Microsoft Excel VBA Programming

Chapter 13: Bug Extermination Techniques

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If your message box shows something unexpected, hit control-break, and you see a dialog box that tells you, “Code execution has been interrupted.” As shown in Figure 13-3, you have four choices:

✓ explained a bit later).

✓

Ctrl+Break. In other words, it’s not very helpful.

Figure 13-3:

Pressing

Ctrl+Break halts execution of your code and gives you some choices.

Feel free to use MsgBox functions frequently when you debug your code. Just make sure that you remove them after you identify and correct the problem.

Inserting Debug.Print statements

As an alternative to using MsgBox functions in your code, you can insert one or more temporary Debug.Print statements. Use these statements to print the value of one or more variables in the Immediate window. Here’s an example that displays the value of three variables:

Debug.Print LoopIndex, CellCount, MyVal

Notice that the variables are separated with commas. You can display as many variables as you like with a single Debug.Print statement. If VBE’s

Immediate window is not visible, press Ctrl+G.

Unlike MsgBox, Debug.Print statements do not halt your code. So you’ll need to keep an eye on the Immediate window to see what’s going on.