Different scan code behavior in X and console

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Hi there,

Sorry to bother. Not sure whether it is correct to post this question
to the mail list, but can't find a suitable linux console user mail
list for discussing this. If you have good mail list to suggest,
please help me to forward. Thanks!

The question is: I tried to make my emacs have the same key response
on both X and console (ssh pts). However, I can't find scan code for
"Ctrl-PageDown" in console mode. I attached the code for testing the
scan code, and below is different behavior in X and console:

============= X ===========
Press a Key 338   // Just type <PageDown>
Press a Key 27
Press a Key 91
Press a Key 54
Press a Key 59
Press a Key 53
Press a Key 126  // 6-chars for <Ctrl-PageDown>
============ Console =========
Press a Key 338  // Same for <PageDown>
Press a Key         // No response for <Ctrl-PageDown>

Any idea on this? Greatly appreciate your replies, your suggested
readings, and so on!

Best Regards,
Lamu Guo

=============Below is text of the code, for easily reading to skip
attachment=================

#include <stdlib.h>
#include <ctype.h>
#include <curses.h>

int main(void)
{
  WINDOW *_window = initscr();
  int _rows;
  int _cols;

  cbreak();

  /* Accept all keys */
  keypad(_window, true);

  /* Don't echo things that are typed */
  noecho();

  /* Get the screen dimensions */
  getmaxyx(_window, _rows, _cols);

  /* Don't display cursor */
  curs_set(0);

  for (;;)
  {
    printw("Press a Key ");
    refresh();
    int key = wgetch(_window);
    printw("%d \n", key);
  }

  endwin();

  return 0;
}

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