Dim path As String

    Private Sub btnOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOpen.Click
        If OFDialog.ShowDialog() = DialogResult.OK Then
            path = OFDialog.FileName
        End If
        Me.txtPath.Text = path
    End Sub


    Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
        System.Diagnostics.Process.Start(path)
    End Sub