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The OLE DB Data Conversion Library supports a limited set of conversions among OLE DB data types. For example, the DBTYPE_BYREF modifier is supported only on the destination type for variable-length data types (DBTYPE_BYTES, DBTYPE_STR, DBTYPE_VARNUMERIC, and DBTYPE_WSTR).
Note
Supported data conversions can be determined through the CanConvert method of the IDataConvert interface.
Click an entry in the following table to see the supported data type conversions.