Yes that is correct. Webgrind is a tool for analyzing files generated
by the profiler built in to xdebug. It should be easy to use, once you
have installed xdebug correctly. And you are correct, an easy way to
spot that xdebug is installed correctly is to see if the output from
var_dump has been enhanced. Xdebug should also appear in you phpinfo()
if it is installed correctly.
I am not much of a windows man, so I am afraid I can't help you much
with the installation of xdebug.
I would expect the steps to be (much like what you have done):
1. Download a windows binary version of xdebug (a dll file)
2. Put the dll in the php extensions folder
3. Add the extension by adding a line in the php.ini file
4. Restart apache
Look at the apache error logs, for clues as to what goes wrong.
Since this is a xdebug question you would probably get better help in
a xdebug group.
Jacob Oettinger