Save DB problem

[Tong Chi Ho]

Dear all,

        I want to save some data in the DB, however i use the codes from
the tutorial of CW5, I found that it will save the data in a new record of
DB. Can anyone tell me that how can i save in the same record (overwrite
the exist record)?

Thank You 
Gary

Here is the code of Save Function:

static void EditSaveData(FieldPtr fld)
{
        CharPtr text;
        VoidPtr textPtr;
        VoidHand        textHandle;
        UInt            index = 0;              
        
        text = FldGetTextPtr(fld);
        
        if (text != NULL && *text != 0)
        {
        // it will make a new record to save, how can i make it overwrite
the existing record??
        textHandle = DmNewRecord(MemoPadDB, &index, StrLen(text) +1);
                
        textPtr = MemHandleLock(textHandle);
        
        DmWrite(textPtr, 0, text, StrLen(text) + 1);

        MemHandleUnlock(textHandle);
        
        DmReleaseRecord(MemoPadDB, index, true);
        }
}