DBUnGetItem

Reverse last call to DBGetItem

#include <DatabaseAccess.h> Data Access Manager

OSErr DBUnGetItem( sessID, asyncPB);

long sessID ; is the session ID

DBAsyncParmBlkPtr asyncPB; is a pointer to the asynchronous parameter

block

returns Error Code; 0=no error

The DBUnGetItem function reverses the effect of the last call to the

DBGetItem function, in the sense that the next time you call the DBGetItem

function it retrieves the same item a second time. It does not remove the

just- retrieved data item from the input buffer. The DBUnGetItem function

can reverse the effect of only one call to the DBGetItem function; you cannot

use it to step back through several previously retrieved data items.

sessID is the session ID that was returned by the DBInit function.

asyncPB is a pointer to the asynchronous parameter block. If you do not want

to call the function asynchronously, set this parameter to NIL

Returns: an operating system Error Code.

noErr (0) No error

rcDBError (-802) Error executing function

rcDBBadSessID -(806) Session ID is invalid

rcDBAsyncNotSupp (-809) The database extension does not support asynchronous

calls

rcDBPackNotInited (-813) The InitDBPack function has not yet been called

Referenced by (3):