Assembly: System.Web (in System.Web.dll)
The method is called during the processes that begin or end editing of the control specified by the webPart parameter, and those that begin or end a connection that includes webPart.
At the beginning of the edit and connection processes, webPart is the control that has been selected to be edited or to enter a connection.
At the end of the edit and connection processes, null is passed to the method, which results in the currently selected control no longer being selected.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.