When you are working on the Appointment custom form in Outlook, you can use the following Events of the appointment item in your custom form’s script.
Open:
This event is called before displaying an appointment item.
Read:
This event is called when the user selects the appointment for editing.
Write:
This event is called before writing the appointment item when user has tabbed off the appointment item in a view. let’s say when you click on ‘Save and Close’ button’ this event will be called before Item_Close() event.
Close:
This event is called before closing the item inspector. Means when user click on ‘Save and Close’ or ‘Close’ button for closing an appointment, this event will be called.
Send:
This event is called before an appointment item is sent by user and before item’s inspector is closed.
Reply:
This event is called when user reply to the sender of an appointment item.
ReplyAll:
This event is called when user reply to the all recipients of an appointment item.
Forward:
This event is called when user forward an item.
BeforeCheckNames:
This event is called when user does a check names on an item.
AttachmentAdd:
This event is called when user insert an attachment into appointment item.
AttachmentRead:
This event is called when an attachment is opened.
BeforeAttachmentSave:
This event is called before saving an attachment.
BeforeDelete:
This event is called when user delete an item.
PropertyChange:
This event is called when a standard Outlook property changes on an item.
CustomPropertyChange:
This event is called when a user property changes on an item
CustomAction:
This event is called when an action is selected by the user.