如何访问运行时创建的组合框

Question

1）如何访问以下代码创建的组合，并在点击combo5.Backcolor = vbgreen后设置button1

2）点击combo5.Backcolor

后如何将vbgreen设置为combo5

3）如何在创建特定组合后将项添加到组合（即combo.Items.Add）

Private Sub CreateComboArray(ByVal number As Integer, ByVal container As Control)

    Dim previouscombowidth As Integer = 0
    Dim position As Integer = 7
    Dim combo As ComboBox
    For i As Integer = 0 To number - 1

        combo = New ComboBox()
        combo.Name = "combo" + i.ToString()
        combo.Items.Add(RichTextBox1.Text.Split(" ")(i))
        combo.SelectedIndex = 0
        container.Controls.Add(combo)

        combo.Height = 22
        combo.Width = (5 * combo.SelectedItem.ToString.Length) + 10

        If i > 0 Then 
            position += previouscombowidth + 3 
        End If

        combo.Left = position
        combo.DropDownStyle = ComboBoxStyle.Simple
        previouscombowidth = combo.Width 
    Next


End Sub