The ListArticles method requests that the server return a
list of news articles in the specified range for the current
newsgroup. The OnNewsArticle event will be fired for each
article returned by the server. When the last news article has been
listed, the OnLastArticle event will be fired.
While the articles in the newsgroup are being listed, the client
cannot retrieve the contents of a specific article. For example, the
GetArticle method cannot be called while inside the
OnNewsArticle event. The client should store those articles
which it wants to retrieve in an array, and then once all of the
articles have been listed, it can begin calling GetArticle for
each article number to retrieve the article text.
A program should use either the ListArticles method or the
GetFirstArticle and GetNextArticle methods, but never in
combination with one another.