OnError Property [Access 2003 VBA Language Reference]
Sets or returns the value of the OnError box in the Properties window for a form or report. Read/write String.
expression Required. An expression that returns one of the objects in the Applies To list.
This property is helpful for programmatically changing the action 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 clicking the Build button next to the On Error box in the form or report's Properties window):
- If Expression Builder is chosen, the value will be "=expression", where expression is the expression from the Expression Builder window.
- If Macro Builder is chosen, the value is the name of the macro.
- If Code Builder is chosen, 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"