getch

[Jacques Le Normand]

Dear curses list,
I'm using linux with curses version 5.7+20100626-0ubuntu1. I have a
few questions about input with getch():

1. control enter:
Is there any way to distinguish "control enter" from "enter" ? They
both return the same thing.

2. alt-n and alt-,
When I hold the alt key and I press the n key twice I get 4 inputs (in decimal):

195 174 195 175

If I hold the alt key and press ',' twice I get these 4 inputs:

194 172 194 172

Do these numbers mean anything?

3. portability

I've been told that the codes change from system to system. If this is
so, how can I make my application more portable?

I hope I'm posting to the right list. If not, please direct me to a
more appropriate list.

Thank you very much for your time
--Jacques Le Normand