hello! i have one button . i want when i click it it will print preview a microsoft document from my desktop. is it possible? how to do it? thank you~

i tried these codes. it can retrieves the doc but it doesnt show in print preview. does anyone know how can i fix it?

Imports System
Imports System.Drawing
Imports System.IO
Imports System.Drawing.Printing
Imports System.Windows.Forms

Public Class samaple

    Inherits Form

    Private WithEvents printPreviewButton As Button

    Private printPreviewDialog1 As New PrintPreviewDialog()
    Private WithEvents printDocument1 As New PrintDocument()

    ' Declare a string to hold the entire document contents. '
    Private documentContents As String

    ' Declare a variable to hold the portion of the document that ' is not printed. 
    Private stringToPrint As String

    Public Sub Newbie()
        Me.printPreviewButton = New System.Windows.Forms.Button()
        Me.printPreviewButton.Location = New System.Drawing.Point(12, 12)
        Me.printPreviewButton.Size = New System.Drawing.Size(125, 23)
        Me.printPreviewButton.Text = "Print Preview"
        Me.ClientSize = New System.Drawing.Size(292, 266)

    End Sub

    Private Sub ReadDocument()
        Dim docName As String = "Optional Supervisor Form Fall 2012.doc"
        Dim docPath As String = "C:\Users\user\Downloads\"
        printDocument1.DocumentName = docName
        Dim stream As New FileStream(docPath + docName, FileMode.Open)
            Dim reader As New StreamReader(stream)
                documentContents = reader.ReadToEnd()
            End Try
        End Try
        stringToPrint = documentContents

    End Sub

    Sub printDocument1_PrintPage(ByVal sender As Object, _
        ByVal e As PrintPageEventArgs) Handles printDocument1.PrintPage

        Dim charactersOnPage As Integer = 0
        Dim linesPerPage As Integer = 0

        ' Sets the value of charactersOnPage to the number of characters  ' of stringToPrint that will fit within the bounds of the page.
        e.Graphics.MeasureString(stringToPrint, Me.Font, e.MarginBounds.Size, _
            StringFormat.GenericTypographic, charactersOnPage, linesPerPage)

        ' Draws the string within the bounds of the page.
        e.Graphics.DrawString(stringToPrint, Me.Font, Brushes.Black, _
            e.MarginBounds, StringFormat.GenericTypographic)

        ' Remove the portion of the string that has been printed.
        stringToPrint = stringToPrint.Substring(charactersOnPage)

        ' Check to see if more pages are to be printed.
        e.HasMorePages = stringToPrint.Length > 0

        ' If there are no more pages, reset the string to be printed. 
        If Not e.HasMorePages Then
            stringToPrint = documentContents
        End If

    End Sub

    <STAThread()> _
    Shared Sub Main()
        Application.Run(New samaple())

    End Sub

    Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        printPreviewDialog1.Document = printDocument1
    End Sub
End Class