Rocketman2,
To post an article, or any web link, you can do one of two things.
1) Copy and past the url for the webpage in your message.
2) Highlight a word or phrase in your post that you'd like to link to the webpage url. In the toolbar, click the insert/edit link button (looks like a chain link) and type or copy/paste the webpage url, choose to open the link in a new window or same window, and optionally give it a title. Finally, click insert and your done!
BearDownAZ