MDAC 2.5 SDK - ODBC Programmer's Reference
Appendix G: Driver Guidelines for Backward Compatibility

SQLParamOptions Mapping

When an application calls SQLParamOptions through an ODBC 3.x driver, the call

SQLParamOptions(hstmt, crow, piRow);

will be mapped to two calls of SQLSetStmtAttr as follows:

SQLSetStmtAttr(hstmt, SQL_ATTR_PARAMSET_SIZE, crow, 0);
SQLSetStmtAttr(hstmt, SQL_ATTR_PARAMS_PROCESSED_PTR, piRow, 0);