Which keystrokes make accents on foreign words. On my desktop Alt 0233 = "/" over "e", but not on laptop.

On my desktop I know all the combinations for the various foreign letters. Alt 0244 = the carrot over the 'o'; Alt 0235 = 2 dots oveer 'e', etc; but on my laptop I can't figure out how to do it. There is no separate keypad; the numbers share the alpha keys and even using the num lock doesn't seem to work. I'm writing in French. Thank you!