I made this so you can see all $chr() in a custom window.
Code:
Put this in your remote (ALT + R in mirc).
Type /ascii in any window and press enter.

alias ascii {
  if (!$window(@ascii)) { window -aClk0 @ascii 637 300 603 322 Verdana 11 }
  var %x = 225
  while (%x) {
    aline @ascii $eval($chr(%x),0) => $chr(%x)
    dec %x
  }
}