wpQueryRefreshFlags - Example Code

This example shows how you can use the refresh flags to synchronize the contents of a folder with the contents of a data base. somSelf is the pointer to the folder containing the objects corresponding to the items in the database.

    MyObject    *Object,*NextObject;

    /* Mark all existing objects as not found   */
    Object = (MyObject*)_wpQueryContent(somSelf,NULL,QC_FIRST);
    while (Object)
    {
       _wpSetRefreshFlags(Object,0);
       Object = (MyObject*)_wpQueryContent(somSelf,Object,QC_NEXT);
    }

    /* Loop through the data base. For each item in the data base, find the
     * corresponding object and call the wpSetRefreshFlags method for the
     * object to set FOUNDBIT on. For any item that does not have a
     * corresponding object, create the object and call the wpSetRefreshFlags
     * method for the new object to set the FOUNDBIT on.  */

    /***** The code for the above described loop goes here *****/

    /* Remove all objects corresponding to data base entries that have been
     * deleted from the data base  */
    Object = (MyObject*)_wpQueryContent(somSelf,NULL,QC_FIRST);
    while (Object)
    {
       NextObject = (MyObject*)_wpQueryContent(somSelf,Object,QC_NEXT);
       ulFlags = _wpQueryRefreshFlags(Object);
       if (!(ulFlags & FOUNDBIT))
       {
          Object->wpDelete(0);
       }
       Object = NextObject;
    }