Syntax

expression.Dirty

expression   A variable that represents a Form object.

Remarks

For example, you may want to ask the user whether changes to a record were intended and, if not, allow the user to move to the next record without saving the changes.

When a record is saved, Microsoft Access sets the Dirty property to False. When a user makes changes to a record, the property is set to True.

Example

The following example enables the btnUndo button when data is changed. The UndoEdits( ) subroutine is called from the AfterUpdate event of text box controls. Clicking the enabled btnUndo button restores the original value of the control by using the OldValue property.

Sub UndoEdits()
    If Me.Dirty Then
        Me!btnUndo.Enabled = True    ' Enable button.
    Else
        Me!btnUndo.Enabled = False    ' Disable button.
    End If
End Sub

Sub btnUndo_Click()
    Dim ctlC As Control
        ' For each control.
        For Each ctlC in Me.Controls
            If ctlC.ControlType = acTextBox Then
                ' Restore Old Value.
                ctlC.Value = ctlC.OldValue
            End If
        Next ctlC
End Sub