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MSDN Library

OLE DB Sample Provider

The OLE DB sample provider, SAMPPROV.DLL, is a learning tool for developers new to OLE DB. Users can display the source code in the debugger to learn about building OLE DB providers. Although this provider uses a simple interface to access data in the underlying data source, it demonstrates the general procedures that developers need to follow when using IOpenRowset to expose rowsets over a file-based data source.

The sample provider offers access to a fixed-length text data file using OLE DB interfaces. The purpose of the sample provider is purely illustrative, and the capabilities of the sample provider are limited; these limitations are discussed in Sample Provider Limitations.

The sample provider opens the sample data file and enables the consumer to read the data, using the IRowset interface, in a forward-only fashion. The consumer can update or delete the current row but cannot add new rows.

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