In which file is new category created?

[yureka]

Hello all,
    A new row is inserted into the prefix_virtuemart_categories  when a new category is added. where is this query executed? in which file. I want to do something after a new category is added .Please help me.

[Milbo]

Do you know that you can use joomla system plugins in the description? the file is BE/models/category.php

Maybe it makes sense to add a trigger, so that you do not need to hack the core.