I have set up my computer as local testing server of Apache, mysql and php, but don't know what is the username and password for connecting to database that I created through DWMX, does anyone knows how to solve this problem? Thanks.
Have a read of the user management documentation of MySQL and see if it helps.
Hmm, not much of a help...
How so? It contains everything you need to know about creating a user account which you can use to access the database.