About the order of events

The following events occur in the order specified when a user completes an action.

Events	When
Open	A form is opened to compose an item.
Send, Write, Close	An item is sent.
Write, Close	An item is posted.
Write	An item is saved.
Close	An item is closed.
Read, Open	An item is opened in a folder.
Reply	A user replies to an item's sender.
ReplyAll	A user replies to an item's sender and all recipients.
Forward	The newly-created item is passed to the procedure after the user selects the Forward action for an item.
PropertyChange	One of the item's standard properties is changed.
CustomPropertyChange	One of the item's custom properties is changed.
CustomAction	A user-defined action is initiated.

The Click event occurs only when you have defined it for a control in the Script Editor.