what is the code for control each wheel in DFRobotShop Omni Rover 2.0 ??

Hi,
please I need the code for using each wheel in omni robot alone.
can any one help me ?

Have you looked at all those Arduino sketches in their User Guide?-

They use 4 pins to control speed and direction of the 2 motors.

yes i already looked, there is 4 motors i want to control each motor alone

How are the motors wired?

Looks to me (although I'm actually at work and don't have time to look properly) that the motors one one side are treated as one motor from a control point of view. You might have to do some thinking about the wiring.