VsDingExtension The object for implementing an Add-in. Implements the constructor for the Add-in object. Place your initialization code within this method. Implements the OnConnection method of the IDTExtensibility2 interface. Receives notification that the Add-in is being loaded. Root object of the host application. Describes how the Add-in is being loaded. Object representing this Add-in. Implements the OnDisconnection method of the IDTExtensibility2 interface. Receives notification that the Add-in is being unloaded. Describes how the Add-in is being unloaded. Array of parameters that are host application specific. Implements the OnAddInsUpdate method of the IDTExtensibility2 interface. Receives notification when the collection of Add-ins has changed. Array of parameters that are host application specific. Implements the OnStartupComplete method of the IDTExtensibility2 interface. Receives notification that the host application has completed loading. Array of parameters that are host application specific. Implements the OnBeginShutdown method of the IDTExtensibility2 interface. Receives notification that the host application is being unloaded. Array of parameters that are host application specific.