How to do two processes at the same time????

Question

hello folks,

           i have a  small issue while developing a windows application using VB.Net . i will explain the scenario here.


My application contains one form which has two tab buttons. say tab1 and tab2. In tab1, i have an option to download data from various sites. this takes few minutes. lets say 15 minutes. and in tab2 i have an option to view the logs.

my problem is i am unable to click the tab2 unless and untill the downloading finish.  my doubt is how to do more than processes at the same time. if i am right we need to use threading concept here. but i have no clue how to implement it.

so guys i am expecting wise advice from ur side.

i will give you more idea if u r not clear with my problem

thanks in advance

shyam