Show a folder with a file selected

    Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load
        ShowFile("C:\config.sys")
    End Sub

    Private Sub ShowFile(PathAndFilename As String)
        Dim FileData As FileInfo = My.Computer.FileSystem.GetFileInfo(PathAndFilename)
        If FileData.Exists = True Then
            Process.Start("explorer.exe", "/select," & FileData.FullName)
        End If
    End Sub