Error Event -- Event Procedures

Error Event Event Procedures

Description

To create an event procedure that runs when the Error event occurs, set the OnError property to [Event Procedure], and click the Build button.

Syntax

Private Sub Form_Error(DataErr As Integer, Response As Integer)

Private Sub Report_Error(DataErr As Integer, Response As Integer)

The Error event procedure has the following arguments.

Argument	Description

DataErr	The error code returned by the Err object when an error occurs. You can use the DataErr argument with the Error function to map the number to the corresponding error message.
Response	The setting determines whether or not an error message is displayed. The Response argument can be one of the following intrinsic constants.
	Constant	Description

	acDataErrContinue	Ignore the error and continue without displaying the default Microsoft Access error message. You can supply a custom error message in place of the default error message.
	acDataErrDisplay	(Default) Display the default Microsoft Access error message.

Remarks You can't cancel the Error event.

See Also Error event — macros.

Example

The following example shows how you can replace a default error message with a custom error message. When Microsoft Access returns an error message indicating it has found a duplicate key (error code 3022), this event procedure displays a message that gives more application-specific information to users.

To try the example, add the following event procedure to a form that is based on a table with a unique employee ID number as the key for each record.

Private Sub Form_Error(DataErr As Integer, Response As Integer)
    Const conDuplicateKey = 3022
    Dim strMsg As String

    If DataErr = conDuplicateKey Then
        Response = acDataErrContinue
        strMsg = "Each employee record must have a unique " _
            & "employee ID number. Please recheck your data."
        MsgBox strMsg
    End If
End Sub