How do I clear out all of the elements in a system.string before the combobox is used again during runtime? Below is the code for how I load it...

Private Sub printout(ByRef letters As String(), ByRef grades As String())

        Dim x As Integer
        Dim strarray(25) As System.String
        'Dim strarray(25) As String
        'strarray = New String()

        For x = LBound(strarray) To UBound(strarray)
            strarray(x) = letters(x) & " - " & grades(x) 'loads results into array
        Next

        TextBox1.Text = "" 'clears textbox
        ComboBox1.Items.AddRange(strarray) 'loads combobox with values

    End Sub

I don't follow what it is you want to do, and where you want to do it at.