The following sample code shows how to replace a WPFolder object class with a WPMyFolder object class at restart of the system:

#define INCL_WINWORKPLACE
#include "os2.h"

PSZ  pszNewClassName="WPMyFolderClass";
PSZ  pszOldClassName="WPFolder";
BOOL rc;

{
  rc = WinReplaceObjectClass(pszOldClassName, pszNewClassName, TRUE);
  if (rc)
  {
    /* Object will be replaced at next start of the system */
  }
  else
  {
    /* WinReplaceObjectClass failed */
   }
}