i
cludestdiohr
i
cludestri
ghr
i
cludewi
dowshr
i
cludesqlhr
i
cludesqlexthr
i
cludesqltypeshr
i
cludeodbcsshr
r
SQLHENVhe
vSQL_NULL_HENVr
SQLHDBChdbc1SQL_NULL_HDBCr
SQLHSTMThstmt1SQL_NULL_HSTMTr
r
r
cpp文件功能说明：r
1数据库操作中的添加，修改，删除，主要体现在SQL语句上r
2采用直接执行方式和参数预编译执行方式两种r
r
i
tmai
r
RETCODEretcoder
UCHARszDSNSQL_MAX_DSN_LENGTH1