/* Handles */   
	SQLHENV  henv = SQL_NULL_HENV;
	SQLHDBC  hdbc = SQL_NULL_HDBC;
	SQLHSTMT hstmt= SQL_NULL_HSTMT;

	/* Local variables */   
	SQLRETURN     sqlrc;   

	SQLWCHAR  dbAliasBuf[SQL_MAX_DSN_LENGTH + 1]; /* buf. to read the db. dir. */
	SQLWCHAR  dbCommentBuf[255];
	SQLSMALLINT aliasLen, commentLen;

	sqlrc = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);   

	sqlrc = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)SQL_OV_ODBC3, SQL_IS_INTEGER);

	sqlrc = SQLDataSources(henv, SQL_FETCH_NEXT, dbAliasBuf, SQL_MAX_DSN_LENGTH + 1, &aliasLen, dbCommentBuf, 255, &commentLen);

	std::cout << sqlrc << std::endl;

	while ( sqlrc != SQL_NO_DATA_FOUND ) 
	{
		std::cout << dbAliasBuf << " " << dbCommentBuf << std::endl;
		sqlrc = SQLDataSources(henv, SQL_FETCH_NEXT, dbAliasBuf, SQL_MAX_DSN_LENGTH + 1, &aliasLen, dbCommentBuf, 255, &commentLen);
	}