Write into registry files using cmds

hey guys n gal did u do tht u can write in windows Registry using command line!!!

its quit ezy
there is built in Tool in windowz...
"reg"
start da command prompt
[start button--> run--->cmd.exe hit enter ]
now type "reg/?"
of " reg add /? " " reg delete /? " bla bla bla ......

example :

c:\>reg add /? █

u'll get all da required info th3r3 abt how to write ...