摘要：Recently I met a strange problem. That tooks me a few hours to dig out the cause. I has a textbox in a access form, the textbox value is SUM([price]), the price can be decimal number, but the textbox ... 阅读全文

摘要：Friend My understanding of Friend is equivalent to “project scope”. Protected The official definiton is that elements are accessible only from within their own class or from a derived class. In OO c... 阅读全文