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为什么在单元 Variants 的过程 _vararrayput 中调用过程 VarStringToOleStr。当将 Variant 类型的变量分配给变量数组的元素时,将调用此方法。事实是,在 Delphi <= 7 字符串类型中使用 for blob。而这种方式用在ODAC的组件中。