ADO 大小 属性
❮ Stream 对象完整参考
Size 属性返回一个长整型值，表示 Stream 对象的大小（以字节为单位）。
注意：此属性只能用于打开的 Stream 对象。
注意：如果流的大小未知，则此属性返回 -1。
语法
objStream.Size
❮ Stream 对象完整参考
❮ Stream 对象完整参考
❮ Stream 对象完整参考
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