how to record a demo

As you can see from the title I dont know how to record a demo. Can someone please explain.

When filing a 'player abuse' or 'admin abuse' complaint, please include
1) The steam id of the offender
2) A brief description of the incident
3) If the complaint is regarding a serious infraction, such as hacking or admin abuse, please include evidence in the form of a screenshot of the abuse and/or a demo of the hacking/incident.

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To obtain Steam IDs
1) Go into your console (press the '~' key)
2) Type status
3) Find the player's name and copy the *ENTIRE LINE* into your post. It should look something like:

1030 "Player's Name" STEAM_0:0:10364169 02:40 102 0 active


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To take a screenshot
1) Press Ctrl - Prt Scrn (I.e. press and hold the Ctrl key. While holding the Ctrl key down, press the Prt Scrn key)
3) Exit out of CS:S (you can press Ctrl - Esc to minimize the game)
4) Open up MS Paint (or some other paint program).
5) Press Ctrl - v to paste the screenshot
6) Save the screenshot as a JPEG file
7) Upload the JPEG file to a file sharing site (like www.photobucket.com) and copy the image link into your post. The image link should look something like:



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To Record a Demo
1) Go into your console (press the '~' key)
2) Type record filename
3) Steam will now record everything you see in the game.
4) Once you have the evidence, go to the console and type stop filename
5) A demo has now been saved on your computer with the file name filename.dem This file will be located in your ...\Valve\Steam\SteamApps\<your user name>\counter-strike source\cstrike folder
6) Upload the file to a file-sharing site and post the link in your post.

Mer had already posted this so i didnt write it.But it is everything you need to know.

thanks