Events in SharePoint

Windows SharePoint Services 3.0 introduces extended support for working with list events. The new event-handling support provides developers an even richer platform for developing custom integration points and building new types of applications on top of Windows SharePoint Services.

List Events
1	FieldAdded	Occurs after a field link is added.
2	FieldAdding	Occurs when a fieldlink is being added to a content type.
3	FieldDeleted	Occurs after a field has been removed from the list.
4	FieldDeleting	Occurs when a field is in process of being removed from the list.
5	FieldUpdated	Occurs after a field link has been updated
6	FieldUpdating	Occurs when a field link is being updated
List Item Events
1	ContextEvent
2	ItemAdded	Asynchronous after event that occurs after a new item has been added to its containing object.
3	ItemAdding	Synchronous before event that occurs when a new item is added to its containing object.
4	ItemAttachmentAdded	Asynchronous after event that occurs after a user adds an attachment to an item.
5	ItemAttachmentAdding	Synchronous before event that occurs when a user adds an attachment to an item.
6	ItemAttachmentDeleted	Asynchronous after event that occurs when after a user removes an attachment from an item.
7	ItemAttachmentDeleting	Synchronous before event that occurs when a user removes an attachment from an item.
8	ItemCheckedIn	Asynchronous after event that occurs after an item is checked in
10	ItemCheckedOut	Asynchronous after event that occurs after an item is checked out.
11	ItemCheckingIn	Synchronous before event that occurs after an item is checked in
12	ItemCheckingOut	Synchronous before event that occurs after an item is checked out.
13	ItemDeleted	Synchronous before event that occurs before an existing item is completely deleted.
14	ItemDeleting	Synchronous before event that occurs before an existing item is completely deleted.
15	ItemFileConverted
16	ItemFileMoved	Occurs after a file is moved.
17	ItemFileMoving	Occurs when a file is being moved.
18	ItemUncheckedOut	Synchronous before event that occurs as an item is being unchecked out.
19	ItemUncheckingOut	Synchronous before event that occurs as an item is being unchecked out.
20	ItemUpdated	Asynchronous after event that occurs after an existing item is changed, for example, when the user changes data in one or more fields.
21	ItemUpdating	Synchronous before event that occurs when an existing item is changed, for example, when the user changes data in one or more fields.