Refresh/Update text field and progress bar while running a sub in vb.net wpf application

I have several reports that all merge onto the same datatable. The user can click several to run and then hit the 'find records' button to run them all simultaneously. Since they each take so long, I'd like to update the user on the status bar as each of these stored procedures is called successfully. However, when I call the procedure, I only get one update at the very end listing everything.

What I'd like to do :

'Initialize Progress Components
repCompleted = 0
ProgressBar1.Minimum = 0
ProgressBar1.Maximum = repSel
ProgressBar1.Value = repCompleted
TextBlock2.Text = repCompleted & " of " & repSel & " reports finished"

Then as each report gets successfully run, update the repCompleted value and refresh

repCompleted += 1
TextBlock2.Text = repCompleted & " of " & repSel & " reports finished"
ProgressBar1.Value = repCompleted

The problem is that these refreshes don't happen until I've exited the sub. I'd like it to count forward as each one finishes i.e. 1 of 4 completed, 2 of 4 completed, etc.

Any ideas?

If your process is running in the foreground (not the background), it blocks the UI. You have to run it in the background so your UI gets free to do something else (like updating your progressbar). Take a look at the BackgroundWorker class, it lets you do exactly that.