Door won't open? Thats a drop top car right? You don't need no stinkin doors,just jump right in.
Ok ,did you try the key?Yeah thats dumb but... Make a "slim jim", a piece of thin guage sheet metal, a foot long ,1-1/2 inches wide. cut some notches near one end and go fishing between the outer side of the door glass and the door skin. Maybe you can hook a rod or linkage and pop the lock open. Before hand, using a penlight , peek into the slot the window retracts into, you might be able to see something.