Excel vba on error goto resume code#
The macro’s not quite perfectĮnter this code and try it out. (Excel prompts you for the macro to assign.) Then you can run the procedure by simply clicking the button. Alternatively, you may want to add a button to a worksheet (use the Forms toolbar to do this) and then assign the macro to the button. You can execute this procedure directly from the VBE by pressing F5. The InputBox function displays a dialog box that asks the user for a value. It then enters the square root of that value into the active cell. Activate the VBE, insert a module, and enter the following code:Īs shown in Figure 12-1, this procedure asks the user for a value. To get things started, I developed a short VBA macro. In other words, you want to anticipate potential errors and deal with them before Excel has a chance to rear its ugly head with a (usually) less-than-informative error message. The ultimate goal of error handling is to write code that avoids displaying Excel’s error messages as much as possible. More specifically, this chapter covers the following: Identifying errorsĭoing something about the errors that occur Recovering from errorsĬreating intentional errors (Yes, sometimes an error can be a good thing.) Instead, I discuss runtime errors - the errors that occur while Excel executes your VBA code. This chapter does not deal with those types of errors. If you make such an error, you won’t even be able to execute the procedure until you correct it. For example, you may spell a keyword incorrectly or type a statement with the wrong syntax. Some of these errors result from bad VBA code. If you’ve tried any of the examples in this topic, you have probably encountered one or more error messages.
Fortunately, VBA includes several tools to help you identify errors - and then handle them gracefully. (I cover programming errors, also known as bugs, in the next chapter.) A well-written program handles errors the way Fred Astaire danced: gracefully. When working with VBA, you should be aware of two broad classes of errors: programming errors and run-time errors. Using the VBA On Error and Resume statementsįinding how you can use an error to your advantage Understanding the difference between programming errors and run-time errors
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