Having Database problems

[ptrcklgrs]

Im having problems with setting up php and mysql. Ive downloaded and ran Xampp correctly. I can use PHP fine but when it comes to setting up a database in mysql everything hits the wall. I can set up a database and create a table using phpmyadmin. But i cant access it in a PHP file. Im not sure where to create a password and username. Does anybody know where a good tutorial is or help me please??
Thank You

[smartie_on_computer]

you say you have phpmyadmin, do u mind if i can have a copy of the php.ini file im the windows folder because i can't seem to get phpmyadmin to work with it

thanks