Speeding up data withdrawal

Question

Hey

I have an application that displays a large quantity of data in a dataGridView control. Even more, I have to "translate" some of the data (some columns in database are numerical although they represent a textual value). My application works fine, but is slow in some sections (I divided it into user defined controls, so the data is not withdrawn all at once, however some sections simply have many entries that need to be displayed). My question is how can I speed this up? I have no idea so any suggestion is very welcome. I'm using VS 2010 to make my application.
Thanks