TrayNotifyIcon/Form Help Required

I have built an application that has two forms, NotifyIcon...

Form1 & 2 are both FixedSingles (ControlBoxes = False)

The program runs at Windows Startup, but is always shown on screen. How do I minimize to tray on Windows Startup?

When I backup my e-mail (200 MB), I would like for the second form to show displaying a message backing-up in a label on a form... When the backup has finished, I want the form to unload.

If the program is minimized to the Sysyem Tray, I still want the second form to appear on screen when a backup is being performed.

I have tried this, but without success:

Dim frm2 as New Form2
frm2.ShowDialog()

Backup routine here

frm2.Hide()

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However, when I display the second form the program stops executing , and the backup is not performed until the second form is unloaded. What do I need to do to continue execution of the backup whilst the second form is displayed?

Thanks in advance for your help