In Rob Ashford’s inspired revival of “How to Succeed in Business Without Really Trying” (by Abe Burrows, Jack Weinstock, and Willie Gilbert, with music by Frank Loesser), we watch with delight as J. Pierpont Finch (Daniel Radcliffe) rises by cunning degrees from window washer to chairman of the board. Every nanosecond of this well-cast production is eloquent with craft and wit. But the laurels of the evening go to Radcliffe and the towering John Larroquette, as the boss, J. B. Biggley. Radcliffe’s youthful brightness is a perfect foil for Larroquette’s dopey severity. Radcliffe is having the time of his life; you feel his joy.