OpenFileDialog Issue - How to get file like (.doc, .xls) to open outside VB

I have the basic structure of an openfiledialog.

My filter is "All Files|*.*"
The folder could contain multiple file types. txt, doc, pdf, xls.

What is required to mirror the execution of one of these file types when double-clicking the file as occurs with Windows Explorer?

I don't seem be be getting there.

Dim pathToFolder As String = glRootDirectory & "\OtherWarrantyInfo"
        OpenFileDialog1.InitialDirectory = pathToFolder
        OpenFileDialog1.FileName = ""
        OpenFileDialog1.Filter = "All Files|*.*"
        OpenFileDialog1.RestoreDirectory = True
        OpenFileDialog1.Multiselect = False
        OpenFileDialog1.ShowDialog()
        If OpenFileDialog1.FileName = "" Then
            Exit Sub
        Else
            OpenFileDialog1.OpenFile()
        End If

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