i have bought 3  20amp fliteline esc from rc dhamaka.. but i have no idea how to program it.. did anyone buy of those??
plz tell me how to use it??

do you want to program it ? or do you want to use it ?
do you have a radio transmitter and receiver ?


http://2bfly.com/knowledgebase/electronic-speed-controls/single-engine-esc-wiring/


check out the above link , the second drawing is for brushless esc

actually these esc are programmable.. so they can't be used without proper programming.

have you tried to use them ?

Most of the ESC's available are programmable , a programmable ESC doesn't mean that you should program it before you use it !
Try using it !
One more your thread is not that much clear
There are  many 20 amp fliteline  ESC , it will be better  if you post the link of your particular ESC !
Don't worry about programming it can be even done through an Arduino !
Stay cool !