how to use Flash code completion?

At this years Flash on开发者_StackOverflow社区 the beach i saw a speaker using small 'code-keywords' that would complete entire sets of AS-code, depending on the keyword.

Ex.: He would write @forloop, hit enter/space and a typical for-loop would be written automatically.

Unfortunately he never said how to access this functionality in Flash.

Can anyone tell me what this is called and how to set it up in Flash Professional?

Flash Professional is about the worst ActionScript editor you will find.

What you speak of, are snippets, and it's supported by any decent editor in one form or another. My personal favourite is FlashDevelop, where snippets are triggered using Ctrl+B by default.
You might also consider FDT or a number of other editors.