Represents the method that will handle events which occur on sending or receiving data to/from the server (such as Smtp.DataSent, Smtp.DataReceived, Pop3.DataSent, Pop3.DataReceived, Imap.DataSent, Imap.DataReceived).

public delegate void DataTransferEventHandler(
	Object sender,
	DataTransferEventArgs e
)

Public Delegate Sub DataTransferEventHandler ( 
	sender As Object,
	e As DataTransferEventArgs
)