This class method returns the name of a class that this object can become.

#define INCL_WINWORKPLACE
#include <os2.h>

M_WPFileSystem     *somSelf;   /*  Pointer to the WPFileSystem class object. */
PSZ                 pszClass;  /*  String containing the name of the new class for files of this class. */

pszClass = wpclsQueryInstanceClass(somSelf);