isearch-whole-buffer?

[xyblor]

Is there a way to search the whole buffer while I type, like Firefox's
"find" command?

As it is now, C-s only searches the text after the point, and C-r
searches the text before the point. I think it would be more convenient
for me if C-s searched the whole text, without forcing me to press C-s
again to overwrap the search. Does anyone know of a function that would
accomplish this? Or maybe there's a variable I can change to get the
desired behavior? I'm using XEmacs 21.4.13 on Win32.

Thanks for any help!