DOC: IsFieldNull() Does Not Accept NULL

MORE INFORMATION

You can write a function to check whether any fields are null. Here is what the function would look like:

   BOOL CYourRecordset::IsAnyFieldNull()
   {
      for (DWORD nIndex = 0; nIndex<=m_nFields-1; nIndex++)
      {
        if (IsFieldStatusNull(nIndex))
             return TRUE;
      }
      return FALSE;
   }
				

Notice that the IsAnyFieldNull() function uses an undocumented function IsFieldStatusNull(). This function is in the implementation section of the CRecordset class so note that the function may change in future releases of MFC. To write code that is not dependent upon undocumented functions, call IsFieldNull() for each field member in the recordset instead.