[lazarus] Silly code message handling question

[Tony Maro]

I'm handling a:

procedure WMKeyUp(var Message: TLMKeyUp); message LM_KEYUP;

How can I only make use of the keys that I want, and pass the remaining 
on to the parent component(s)?

I just want to grab arrows, without interfering with menu keyboard 
shortcuts.

Currently I have the following within the procedure:

if Message.CharCode = VK_UP then begin
   ... do my stuff ...
    exit;
end;

Which works great for handling the VK_UP, but it's not passing on the 
ones I don't handle.

Thanks,

Tony