if (pfnSetDllPath) pfnSetDllPath(NULL);
HRESULT DeInitializeXPIStub(){  pfnXpiInit    = NULL;  pfnXpiInstall = NULL;  pfnXpiExit    = NULL;  if(hXPIStubInst)    FreeLibrary(hXPIStubInst);  chdir(szSetupDir);  return(0);}