Show welcome screen in windows form

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C#

Hi friends
I want to show welcome screen for 5 to 10 second when application run and then login form should show.

I write below code but it is not working, Login screen is shown but welcome screen does not hide.

on main funcation.

Application.Run(new frmWelcome());

On frmWelcome load event

for (int i = 1; i <= 100; i++)
{
    System.Threading.Thread.Sleep(10);
    pBars.Value = i;
}
this.Hide();
frmLogin login = new frmLogin();
login.Show();

pBars is Progress Bar.

I want to show welcome screen without progress bar for 5 second and show login screen.

Thanks
Imrankhan