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Rules for Tools/popupkey()

SYNOPSIS
     char popupkey(struct Window *window, char originalkey)

ARGUMENTS
    `struct Window *window'
          Current window.

    `char originalkey'
          Previous key.

DESCRIPTION
     `popupkey()' displays an octave of piano keys under the mouse so
     the user can select a key from the octave.  Provide the previous
     key in `originalkey' and `popupkey()' will return that keyif the
     user does not select a new key.  The returned key ranges from 0,
     for C at the bottom of the octave, to 11, for B at the top of the
     octave.

     Use `popupkey()' in conjunction with `popupoctave()' to select
     MIDI notes.

SEE
     See popupoctave().