You type it just as you see it on the page listing the Markup codes. The basis of Markup is the use of the square brackets and a few words that usually describe what it does.

For the emoticons, if you put the word "smile" in these brackets [ ] (without the quotations, you get this: There is nothing else needed but those brackets around the word.

When doing colors or other modifications of the text, you have a bracket set [ ] to start and finish the section you want to change. [*b]bold[*/b] -- just remove the stars. That / slant in the second bracket set is to tell the browser that this is where you want your chosen effect to end. To practice, you can start a message, and make sure "I want to preview my post" is selected. If you see the colors/emoticons you want, you got it right.

I hope that helps.