主题：[求助]帮我检查下代码有什么问题

帮我检查下，我看的都快吐了，下面代码有什么问题：

Dim Filter As String
With e.Form.Controls("发货单")
    If .checked = True Then
        Filter = Filter & "发货单 = false"
    End If
End With
With e.Form.Controls("快递单号")
    If Filter > "" Then
        Filter = Filter & " And "
    End If
    If .checked = True Then
        Filter = Filter & "快递单号 = '0'"
    End If
End With

运行说什么and后缺少运算符