Autofill mode for source code.

[Karthik]

Hi,

I read about Autofill mode both in the manual and EmacsWiki. Apparently 
it only works on comments and not on source code when using programming 
major modes. I can at least see this in cc-mode. Is there a way to 
automatically wrap source code (while typing it in) after it reaches a 
column limit? Also is there a way to apply such a rule on existing 
source code? I tried Google but to no avail. Any help would be appreciated.

Thanks,

Karthik Ravikanti