Sharing Data between Forms/Windows in WPF

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VB

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forms

Hello

Yesterday I asked a question about Modules with Visual basic and WPF but still haven't found an answer to my question. I am currently working on a computing project in which data must be entered in from a "Form" to a database. My project is in Visual Basic as a WPF Application. The reason I have used WPF is so that I can create different styled forms and Login screens. I attempted to set up 2 WPF Windows with Textboxes on the first one (Window1) and Labels on the second (Window2). I kept getting a number of errors every time, so as an experiment I created a fresh new project under Windows Forms rather than a WPF Application. In [Form 1] I added a textbox called [Textbox1] and a button called [btnSend]. Here is my code for [Form 1]:

Public Class Form1
    Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
        Form2.Show()
    End Sub
End Class

Very simple, All it does is open up the Second Form on the click event of the button.

On [Form 2] I have a label called [label1]. (If your wondering why I left the names as there default, its to keep everything simple.) So heres the code for [Form 2]:

Public Class Form2
    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Label1.Text = Form1.Textbox1.Text
    End Sub
End Class

So what [Form 2] does, is simply when loaded make [label1] equal to [textbox1] on [Form 1]. I compiled the application and it worked fine. Typed random things into the textbox and once I clicked the button the second form loaded up and displayed whatever I had typed into the textbox on the first form.

So I thought to myself, "Ok that works, now I will create a fresh new WPF Application, create a WPF Window and a Form and copy the code in, tweak any names so that everything is linked up correctly....". No. I now get the error message:

Error 1 Reference to a non-shared member requires an object reference.

Which corresponds to the the line

Form2.Show() 

on [Form 1]. I also get the same error message for

Label1.Text = Form1.Textbox1.Text

in [Form 2].

Just to make sure it wasn't something to do with the change from a WPF Window to a standard form. I create a fresh new project and create 2 standard Forms and tried it again. Same error messages. Does anyone know why I'm getting error messages in a WPF Application but not in a Windows Standard Form? Can anyone help me with some examples using Visual Basic in a WPF Application as I have been searching for days and have found nothing.

Thank you