Straighten out a wire hanger. Then bend one end of the hanger to form either a hook or a triangular handle.
If the car is an older model, pry open a window by slipping a putty knife or between the window and the door.
Slip the bent wire hanger through the window opening.
Maneuver
the hanger down along the window. Attempt to either pull up the door
lock or push the lock button, depending on your car's lock style.
If your car is a newer model, you'll have to call a locksmith or tow truck. Your attempts to break into it could cause permanent damage.