pgUp/pgDown keys

[Peter Hercek]

There does not seem to be a name for PgUp and PgDown keys in .haskeline.
Putting their codes directly (e.g. ^VPgUp in vim insert mode) instead of 
name into "bind:" line does not seem to work.

How can I define behavior for PgUp/PgDown in haskeline?
  ... I mean without cheating by e.g. assigning PgUp/PgDown escape 
sequence to e.g. ctrl-up (with keyseq) and then defining the behavior 
for ctrl-up.

Thanks,
  Peter.