using a dropdown list to select info

[thetickisme]

Trying to find a good tutorial on using drop down selects to populate a grid. I have about 200 categories and I need the user to be able to select category in one vendor in another and click the select button to populate the grid.
If possible I would like it to work with my current grid as well.

Any tutorials out there? ASP.NET VB Code if possible.

thanks

Mike