In how many ways we can create new document and how to implements this ways?

Question

I found that we can create new document by 3 ways
1)by using session object of application ,document list as follow
InterfacePtr<IApplication> firstdoc(GetExecutionContextSession()->QueryApplication());
          InterfacePtr<IDocumentList> docList(firstdoc->QueryDocumentList());
  docList->NewDoc(25089,IDataBase::ProtectionLevel.kProtectSave, nil);
but in this case i am not getting how to use newdoc method i.e which parameter we have to pass(not even clear from API reference )
2)by using command
InterfacePtr<IApplication> firstdoc(GetExecutionContextSession()->QueryApplication());
          InterfacePtr<IDocumentList> docList(firstdoc->QueryDocumentList());
  InterfacePtr<ICommand> new1(CmdUtils::CreateCommand(kNewDocCmdBoss));
          UIDList asd(docList);
          new1->SetItemList(asd);
          CmdUtils::ProcessCommand(new1);
3)bu using some util or facade interface
Utils<IDocumentCommands>()->New( . . .)
in this case also  i am not geeting how to use new method 
I try all this method but none of them working .i knew i am doing some mistake  in all these method so please correct me where i am wrong .
Main problem is in the first parameter of newdoc method i.e what is class id how to use them 

Answer 1

1. add to your project "SDKLayoutHelper.cpp", "SDKLayoutHelper.h"
2. #include "SDKLayoutHelper.h"
insert code:
do{
         SDKLayoutHelper helper;
         UIDRef docRef = helper.CreateDocument();
         if (UIDRef::gNull == docRef)
             break;
         helper.OpenLayoutWindow(docRef);
    }while(kFalse);
Regards!