Cross-Thread!

[andrew92fu]

Ho risolto!!!

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.trd = New Thread(AddressOf Me.Thrd)
        Me.trd.IsBackground = True
        Me.trd.Start()
    End Sub

    Private Sub AggiungiTesto(ByVal row1 As String, ByVal row2 As String, ByVal row3 As String, ByVal row4 As String, ByVal row5 As String, ByVal row6 As String, ByVal row7 As String, ByVal row0 As String)
        If ListView1.InvokeRequired Then
            Dim d As New SetTextCallback(AddressOf AggiungiTesto)
            Me.Invoke(d, New Object() {row1, row2, row3, row4, row5, row6, row7, row0})
        Else
            Me.ToolStripComboBox1.SelectedItem = Me.ToolStripComboBox1.Items.Item(0)
            Dim row8 = {row1, row2, row3, row4, row5, row6, row7}
            ListView1.Items.Add(row0).SubItems.AddRange(row8)
            ToolStripStatusLabel1.Text = "Ci sono " & i & " elementi nel database"
        End If
    End Sub

    Public Sub Thrd()
        Dim db As New MySqlConnection
        db.ConnectionString = Str_Co
        Try
            db.Open()
            Dim sql As String = "SELECT * FROM wrz"
            Dim cmd As MySqlCommand = New MySqlCommand(sql, db)
            Dim rdr As MySqlDataReader = cmd.ExecuteReader()
            While rdr.Read
                AggiungiTesto(rdr.Item(2).ToString, rdr.Item(3).ToString, rdr.Item(4).ToString, rdr.Item(5).ToString, rdr.Item(6).ToString, rdr.Item(7).ToString, rdr.Item(0).ToString, rdr.Item(1).ToString)
                i += 1
            End While
        Catch ex As Exception
            MsgBox("Impossibile Leggere il Database: Errore 0001")
        End Try
    End Sub

Grazie lo stesso! =)