Dim Filter As String
With e.Form.Controls("cmbProduct")
    If .Value IsNot Nothing Then
        Filter = "产品 = \'" & .Value & "\'"
    End If
End With
With e.Form.Controls("cmbCustomer")
    If .Value IsNot Nothing Then
        If Filter > "" Then
            Filter = Filter & " And "
        End If
        Filter = Filter & "客户 = \'" & .Value & "\'"
    End If
End With
With e.Form.Controls("cmbEmployee")
    If .Value IsNot Nothing Then
        If Filter >"" Then
            Filter = Filter & " And "
        End If
        Filter = Filter & "雇员 = \'" & .Value & "\'"
    End If
End With
With e.Form.Controls("StartDate")
    If .Value IsNot Nothing Then
        If Filter >"" Then
            Filter = Filter & " And "
        End If
        Filter = Filter & "日期 >= #" & .Value & "#"
    End If
End With
With e.Form.Controls("EndDate")
    If .Value IsNot Nothing Then
        If Filter >"" Then
            Filter = Filter & " And "
        End If
        Filter = Filter & "日期 <= #" & .Value & "#"
    End If
End With
If e.Form.Controls("rdoYifu").Checked = True \' 如果付款状态选择了"已付"
    If Filter >"" Then
        Filter = Filter & " And "
    End If
    Filter = Filter & "已付款 = True"
End If
If e.Form.Controls("rdoWeifu").Checked = True \' 如果付款状态选择了"未付"
    If Filter >"" Then
        Filter = Filter & " And "
    End If
    Filter = Filter & "已付款 = False Or 已付款 Is Null"
End If
If Filter > "" Then
    Tables("订单").Filter = Filter
End If

这是使用指南的查询窗口，请问这个怎么改成包含，还有多选又该怎么设计