Progess bar in C# windows aplication

Question

Hai all,
I create a windows application program, it have some crystal reports. crystal reports take 2 to 10 seconds to display because a 'loop program' work to take data from the database. I want to place a progress bar in this time. How to calculate the time taken by the 'loop program' and set 'the progress bar values'. I am the new one in this.
Thanks in advance
Madhukumar Viswanath