When you load your word document, you should probably break document up into a List<string> where each item in the list contains a single paragraph. Then all you have to do is navigate through the items in the List and show them.
Update:
Dim currentIndex As Int
Dim list As New List(Of String)
currentIndex = 0
For Each p In currentDocument.Paragraphs
list.Add(p.range.text)
Next p
TextBox.Text = list[currentIndex]
Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
currentIndex = currentIndex + 1
TextBox.Text = list[currentIndex]
End Sub
There are probably some syntax errors in this snippet as I don't do any VB.Net development anymore, but I think this will give you the idea. You'll also have to make sure to validate to make sure that things like the currentIndex and such are within a valid range before trying to apply them.
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