VB.net Printform cant find path - vb.net

Question

So I am working on a form which need to be printed. I want to end up with a PDF file using Foxit PDF printer. The problem is that I cant figure out how to get the selected path as file location so I keep getting an the Path cannot be null.
error. Where in the code should I put my filelocation when using the Printform?
In this code the foldername is the location where I want to print.
Private Sub BtnPrint_Click(sender As Object, e As EventArgs) Handles BtnPrint.Click
Dim folderDlg As New FolderBrowserDialog
Dim foldername As String
folderDlg.ShowNewFolderButton = True
If (folderDlg.ShowDialog() = DialogResult.OK) Then
foldername = folderDlg.SelectedPath
Dim root As Environment.SpecialFolder = folderDlg.RootFolder
End If
PrintForm1.Print()
End Sub
Edit:
Actually deleted part of the code and still getting the same error (first part wasnt doing anything to start with I know that). All I am using now is:
Private Sub BtnPrint_Click(ByVal sender As System.Object, ByVal e As EventArgs) Handles BtnPrint.Click
PrintForm1.Print()
End Sub
Also microsoft help database about Printform isnt helping since I have done exactly what it says and still getting the Path is Null error
Edit 2:
So I am using this code now and it is working.
Private Sub BtnPrint_Click(ByVal sender As System.Object, ByVal e As EventArgs) Handles BtnPrint.Click
PrintDialog1.PrinterSettings = PrintForm1.PrinterSettings
PrintDialog1.AllowSomePages = True
If PrintDialog1.ShowDialog = DialogResult.OK Then PrintForm1.PrinterSettings = PrintDialog1.PrinterSettings
With Me.PrintForm1
.PrintAction = Printing.PrintAction.PrintToPreview
Dim MyMargins As New Margins
With MyMargins
.Left = 10
.Right = 10
.Top = 10
.Bottom = 10
End With
.PrinterSettings.DefaultPageSettings.Margins = MyMargins
.Print()
End With
End Sub
but as soon as I try to set which area it should print I get the following error: "Printing is not a member of powerpacks". I tried using the following code according to microsoft this is the way it should work.. I have no clue where the error comes from
.Print(Me, PowerPacks.Printing.PrintForm.PrintOption.ClientAreaOnly)

Answer 1

You don't need a path to use printform. Printform just prints what you see on the screen to your default printer. You need to install "Visual Basic PowerPacks" to use this command. More explanation you may find here:
https://learn.microsoft.com/en-us/dotnet/visual-basic/developing-apps/printing/how-to-print-a-form-by-using-the-printform-component

Answer 2

To preview your print you don't need to use printdialog and all this. You just click on printform1 in the designer,to get up the properties window of printform1. In printaction you choose PrintToPreview. Thats all its needed.
These are all the lines I need:
Public Class Form1
Private Sub Exit_Click(sender As Object, e As EventArgs) Handles Button2.Click
Application.Exit()
End Sub
Private Sub Print_Click(sender As Object, e As EventArgs) Handles Button1.Click
PrintForm1.Print()
End Sub
End Class