TIdNNTPOnArticleByNo is an event type signalled when the server executes the command event handler for the NNTP ARTICLE command. TIdNNTPOnArticleByNo is the type assigned to the TIdNNTPServer OnArticleByNo property.
AThread is the NNTP client thread receiving the event notification.
AMsgNo is the message number received in the NNTP ARTICLE command handler.