Copyright 2004 Your Name Here <userid domain.com> foo.h Foo General description that will appear in the overview page and in the HTML reference and man page. Foo definitions and functions The foo(3) module ... in-depth description here (does not appear in the man page) ... Foo definitions 
struct foo {
	int n; /* members must be indented by a tab */
};
Description of Foo definitions (does not appear in the man page) ... 
int foo_bar(struct foo *foo, int n);
The foo_bar function ... The foo_bar function returns 1 or 0 to indicate ...