creating MessageChoiceBean Programatically and attach VO to it.

//add the code to the ProcessRequest() function in controller class.

String sMode = "test";

//Getting  application module object;

OAApplicationModule am = pageContext.getApplicationModule(webBean);

//create or create exiting  View  object;

OAViewObject oaviewobject = (OAViewObject)am.createViewObject("xxScoResourceVO1","xx.oracle.apps.pa.poplist.server.testVO");

//Setting where clause Dynamically of Poplist VO

oaviewobject.setWhereClause("DESCRIPTION IS NULL OR DESCRIPTION = '" + sMode + "'");

//execute the query of vo.

oaviewobject.executeQuery();

//create  object of OAMessageChoiceBean  class.

OAMessageChoiceBean oamessagechoicebean = (OAMessageChoiceBean)createWebBean(pageContext, "MESSAGE_POPLIST");

//setting the properties of OAMessageChoiceBean Class

oamessagechoicebean.setPrompt("Back");

//setting or attach the view object  with the MessageChoiceBean.

oamessagechoicebean.setListViewObject(pageContext, oaviewobject);

//setting or attach the  attribute/columns of  view object  with the MessageChoiceBean.

oamessagechoicebean.setListDisplayAttribute("Meaning");

//setting or attach the  attribute/columns of  view object  with the MessageChoiceBean.

oamessagechoicebean.setListValueAttribute("LookupCode");

 //setting other  necessary value for MessageChoiceBean.

oamessagechoicebean.setName("xxAddAsgmtApplyAction");

oamessagechoicebean.setAllowBlankValue(false);

oamessagechoicebean.setDefaultValue("RETURN_BACK"); //Setting Default Value

webBean.addIndexedChild(oamessagechoicebean);