SQLDescribeParam()

Retrieves information about prepared parameters.

SQLNumParams()

Retrieves the number of parameters in an SQL statement.

SQLSetStmtAttr()

SQLSetConnectAttr()

SQLGetStmtAttr()

Set or retrieve statement options, such as asynchronous processing, orientation for binding rowsets, maximum amount of variable length data to return, maximum number of result set rows to return, and query timeout value.

Note that SQLSetConnectAttr() sets options for all statements in a connection.