define external counter function SQLDrivers
     (  read-only SQL_handle_type EnvironmentHandle,
        value counter Direction,
        modifiable stream DriverDescription,
        value counter BufferLength1,
        modifiable counter DescriptionLength,
        modifiable stream DriverAttributes,
        value counter BufferLength2,
        modifiable counter AttributesLength )

Lists driver descriptions and attribute keywords.

Input arguments:

• EnvironmentHandle.
• Direction. Determines whether to fetch the next driver description in the list (SQL_FETCH_NEXT) or the search starts from the beginning of the list (SQL_FETCH_FIRST).
• BufferLength1. The maximum length of DriverDescription.
• BufferLength2. The maximum length of DriverAtributes.

Output arguments:

• DriverDescription. The returned driver description.
• DescriptionLength. The returned length of DriverDescription.
• DriverAttributes. The buffer of the driver attribute value pairs.
• AttributesLength. The returned length of DriverAttributes.