Sending Emails from Windows form with Progress Bar

Hi, 

I want to send multiple attachments using smtp client in my C# windows form application. Right now I am able to send the mail but I am not able to show any progress bar on the screen for the user to know that the application is still running. I thought it would be great if I could show a Progress Bar on the screen showing the progress of the mail.

Could someone help me with this?

Thanks