Under which language is vbulletin created?

[avillax]

What is the computer language they used to create vbulletin?.

What tools, knowledge was used to create vbulletin boards?.
And how do you create vbulletin skins?

[Lynne]

It's done in php mostly.

You create styles by modifying the templates and css in the Styles & Templates area of the Admin CP.

[avillax]

So php is a progamming language on its own?

[Lynne]

Yes, php is a programming language. There is a lot of MySQL also used in the code.

[James Birkett]

Yeah, vBulletin is programmed in mainly PHP, using MySQL whenever any database connection is made.
It also uses some JavaScript/AJAX functionality, however not a major amount.

All of the above can be learnt at w3schools. A simple Google search will retrieve plenty of tutorials.

As Lynne said, you can modify the style by editing the CSS (or templates) in the Styles & Templates manager.

Refer to the vBulletin User Manual for help.