wpQueryObjectID - Syntax

This method is specific to version 3, or higher, of the OS/2 operating system.

This instance method returns the unique, text object ID that was assigned to the given object when it was installed or changed (with wpSetup).

#define INCL_WINWORKPLACE
#include <os2.h>

WPObject     *somSelf;      /*  Pointer to the object on which the method is being invoked. */
PSZ           pszObjectID;  /*  String containing a unique object ID. */

pszObjectID = _wpQueryObjectID(somSelf);