Visual Basic (Using Visual Studio 2017) : I am brand new to Visual Basic and am a little lost.  I was trying to import what I thought was correct to be able to use classes that seem to pop up when using VBA macro functions.  Right now my code is not recognizing Workbooks.

My main goal is to simply use a Visual Studio Windows Form in Visual Basic to open an excel file in a specific directory using a name that is typed in the text box, and save-as into a .txt file.  It seems like I am missing a major import or COM reference.  Any help?

    Imports Microsoft.Office.Interop
    Imports Microsoft.VisualBasic


    Public Class Form1

    Dim path As String = "C:\Users\Dustin\Desktop\"
    Dim filename1 As String

    Private Sub txtBoxExcelFileNameString_TextChanged(sender As Object, e As EventArgs) Handles txtBoxExcelFileNameString.TextChanged
        filename1 = txtBoxExcelFileNameString.Text

    End Sub

    Private Sub btnExcelSaveAs_Click(sender As Object, e As EventArgs) Handles btnExcelSaveAs.Click

        Workbooks.Open Filename:=path & filename1

    End Sub
    End Class


[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/ApV7l.png