Assembly: System.Web (in System.Web.dll)
The method raises the WebPartMoving event, which occurs when a WebPart or other server control is being moved within its zone or to another zone. The method also provides the opportunity to cancel the moving process. If the move is successfully completed, the WebPartMoved event follows.
Page developers can provide a custom handler for the associated event by adding the OnWebPartMoving attribute to the <asp:webpartmanager> element on a Web page, and then assigning a custom method name to the attribute.Notes to Inheritors
Developers who create derived WebPartManager classes can override the method to customize the event handling.