Form.OnError property (Access)

Sets or returns the value of the On Error box in the Properties window of a form or report. Read/write String.



expression A variable that represents a Form object.


This property is helpful for programmatically changing the action that Microsoft Access takes when an event is triggered. For example, between event calls you may want to change an expression's parameters, or switch from an event procedure to an expression or macro, depending on the circumstances under which the event was triggered.

The Error event occurs when a run-time error is produced in Microsoft Access when a form or report has the focus. This includes Microsoft Jet database engine errors, but not run-time errors in Visual Basic.

The OnError value will be one of the following, depending on the selection chosen in the Choose Builder window (accessed by choosing the Build button next to the On Error box in the object's Properties window):

  • If you choose Expression Builder, the value will be =expression, where expression is the expression from the Expression Builder window.

  • If you choose Macro Builder, the value is the name of the macro.

  • If you choose Code Builder, the value will be [Event Procedure].

If the On Error box is blank, the property value is an empty string.


The following example associates the Error event with the macro Error_Handler_Macro for the Order Entry form.

Forms("Order Entry").OnError = "Error_Handler_Macro"

Support and feedback

Have questions or feedback about Office VBA or this documentation? Please see Office VBA support and feedback for guidance about the ways you can receive support and provide feedback.