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Programming Microsoft® Visual Basic® 6.0 by Francesco Balena

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OLE DB Simple Providers

Visual Basic 6 provides you with the capability of building OLE DB Simple Providers—that is, components that can be registered in the system and that can be used by standard data sources to connect to data in a proprietary format. This capability can be useful in countless situations. For example, during the porting of a legacy application from MS-DOS to Microsoft Windows, you often need to continue to read data in the old format. Thanks to a custom OLE DB Simple Provider, you can access the old data from the new program using standard syntax and you can switch to a standard (and more efficient) OLE DB provider when the porting of the code is complete and you're ready to convert the database data to SQL Server or another ...

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