Call ViewCriteria Programmactically

1.First Call viewObject
2.Then Call viewCriteria by using getViewCriteria();

ViewObjectIMpl vo=this.getSomeViewObject();
ViewCriteria vc=vo.getViewCriteria("Crietria name");

-APPlyViewCriteria //viewobject refernce
vo.applyViewCriteriea(vc);
-ResetViewCriteria  // viewcrietria refernce
vc.resetCriteria();
-RemoveViewCriteria. // viewobject refernce
Vo.removeViewCriteria("Criteria name");