How 2 show some one profile picture in chatting window

So, friends hello one day I saw someone send me smileys that made from some special codes,then I think that from where these codes made.
Then I saw same codes on someone's profile and I just copied it and and add 2 brackets after and before
CODE and bang :) ..Its done..

Steps1:- Get someone's code from his/her profile.
Go to his/her profile and see in the URL you will get the CODE :)
Note:- Code can be his/her USERNAME

Step2:-Copy that CODE and paste it the chatting window

Step3:- Just add 2 brackets before and after the CODE.

for example:-IF the code is 100003762548134 then the code will be
[[jharahuld]] or[[code prvd br fb]]

Step3:- Press ENTER :)

Its done....


enjoy