Close Event
Occurs when the Inspector associated with an Outlook item is being closed.
Sub object_Close(Cancel As Boolean)
object An expression that evaluates to an object in the Applies To list. In VBScript, use the word Item.
Cancel Optional (not used in VBScript). False when the event occurs. If the event procedure sets this argument to True, the close operation is not completed and the inspector is left open.
Remarks
In VBScript, if you set the return value of this function to False, the close operation isn't completed and the inspector is left open. This event cannot be cancelled for the Inspector and Explorer objects.
If you use the Close method to fire this event, it can only be canceled if the Close method uses the olPromptForSave argument.
Example
This example tests for the Close event and if the item has not been Saved, it uses the Save method to save the item without prompting the user.
Function Item_Close()
If Not Item.Saved Then
Item.Save
End If
End Function