when i use DBNumberofColumns(dbhd),there is an error described as follow:
NON-FATAL RUN-TIME ERROR
"db_test.c", line 27, col 15, thread id 0x00000298
Function DBNumberOfColumns: (return value == -11 [0xfffffff5]).
Automation error code -2147352573 0x80020003
找不到成员。
but the function DBNumberOfRecords(dbhd) is sucess!! why?
