The wpclsQueryExtendedCriteria method is called to allow the specified class to specify the extended criteria to be used on a search for instances of this class.

#define INCL_WINWORKPLACE
#include <os2.h>

M_WPObject     *somSelf;           /*  Pointer to the WPObject class object. */
PSZ             Title;             /*  Pointer to the title specification for objects to be searched. */
ULONG           ulSearchType;      /*  Flag indicating type of search to be performed. */
PVOID           ExtendedCriteria;  /*  Pointer to a buffer that contains the class-specific extended search criteria. */
BOOL            fSuccess;          /*  Success indicator. */

fSuccess = wpclsQueryExtendedCriteria(somSelf,
             Title, ulSearchType, ExtendedCriteria);