Inspector.Close Event (Outlook)
Occurs when the inspector associated with a Microsoft Outlook item is being closed.
In Microsoft Visual Basic Scripting Edition (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 canceled.
If you use the Close method to fire this event, it can only be canceled if the Close method uses the olPromptForSave argument.