Form.Dirty property (Access)
You can use the Dirty property to determine whether the current record has been modified since it was last saved. Read/write Boolean.
expression A variable that represents a Form object.
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.
The following example enables the btnUndo button when data is changed. The UndoEdits( ) subroutine is called from the AfterUpdate event of the text box controls. Choosing 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
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