Hi Ron,
I just went through this myself. If you look back a few days, you'll see
that I needed to copy libmysql.dll to the %systemroot%\system32
directory to get it to work with Apache. Try it!
You don't have to put anything to %systemroot%\system32.
Just read the somewhat offical setup instructions in the PHP Manual:
http://www.php.net/manual/en/install.windows.manual.php
and follow those recommendations carefully.
If this does not work for you, we would be happy to see your bugreport
at bugs.php.net.