Imports System.IO
Public Class Form1
 
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button2.Click
        Me.Hide()
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        TextBox1.Focus()
    End Sub
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
 
        Dim fs As New FileStream("\My Documents\IH\BEMIDAT2.txt", _
          FileMode.Append)
        Dim sw As New StreamWriter(fs)
        sw.Write(TextBox1.Text & "," & DateAndTime.Now.ToString & ",")
        sw.Close()
 
        Dim f2 As New Form2
        f2.EqualText = Me.TextBox1.Text
        f2.ComboBox1.Items.Add("Fehler 1")
        f2.ComboBox1.Items.Add("Fehler 2")
        f2.ComboBox1.Items.Add("Fehler 3")
        f2.ComboBox1.SelectedIndex = 0
        f2.ShowDialog()
        TextBox1.Text = ""
        TextBox1.Focus()
 
    End Sub
 
End Class
Form2
 
Imports System.IO
Public Class Form2
    Private mEqualText As String
    Public Property EqualText() As String
        Get
            Return Me.mEqualText
        End Get
        Set(ByVal value As String)
            Me.mEqualText = value
        End Set
    End Property
    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles MyBase.Load
        Me.TextBox2.Focus()
    End Sub
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button3.Click
 
        Dim fs As New FileStream("\My Documents\IH\BEMIDAT2.txt", _
          FileMode.Append)
        Dim sw As New StreamWriter(fs)
        sw.Write(mEqualText & "," & DateAndTime.Now.ToString & "," & _
          ComboBox1.SelectedItem.ToString & vbCrLf)
        sw.Close()
 
        If TextBox2.Text <> Me.mEqualText Then
            MsgBox("Barcodes nicht identisch! Bitte neu einscannen.",  _
              MsgBoxStyle.Critical, "Hinweis!")
            TextBox2.Text = ""
            TextBox2.Focus()
        Else
            Me.Close()
        End If
 
    End Sub
 
End Class