[xmonad] how to map XF86* keys?

[Chengqi Song]

Hi All,

I want to map my vol up and vol down keys. I used xev to capture their info as follows:

KeyRelease event, serial 27, synthetic NO, window 0x1600001,
    root 0x115, subw 0x0, time 1035672, (320,301), root:(321,319),
    state 0x0, keycode 122 (keysym 0x1008ff11, XF86AudioLowerVolume), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyPress event, serial 27, synthetic NO, window 0x1600001,
    root 0x115, subw 0x0, time 1036158, (320,301), root:(321,319),
    state 0x0, keycode 123 (keysym 0x1008ff13, XF86AudioRaiseVolume), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

but I dont know how to use them in my xmonad.hs like other keys:

myKeys = \c -> mkKeymap c $
    -- volume key binding
    [ ("M-=", spawn "aumix2pipe +10")
    , ("M--", spawn "aumix2pipe -10")


Could anyone provide a solution?

thanks
lars