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Call this member function to determine whether the CDatabase object allows updates.

BOOL CanUpdate( ) const;

Nonzero if the CDatabase object allows updates; otherwise 0, indicating either that you passed TRUE in bReadOnly when you opened the CDatabase object or that the data source itself is read-only. The data source is read-only if a call to the ODBC API function SQLGetInfo for SQL_DATASOURCE_READ_ONLY returns "y".

Not all drivers support updates.

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