System.Diagnostice.Process not printing PDF

I have a PDF file which I must print. So I wrote the following code in my application


Private Sub btnPrint_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnPrint.Click

Try

 
I have a PDF file which I must print. So I wrote the following code in my application

Private Sub btnPrint_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnPrint.Click
Try
Dim psiPrint As New System.Diagnostics.Process
psiPrint.StartInfo.Verb = "open"
psiPrint.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
psiPrint.StartInfo.FileName = "Deltax.pdf"

psiPrint.StartInfo.UseShellExecute = True
psiPrint.Start()
Catch ex As Win32Exception


...