Document/View architecture, Creating Single Document Template Application

I have created a Single Document Template Application using MFC AppWizard.

The AppWizard has automatically added the following code to the InitInstance method of the Application class:

CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MENU1,
RUNTIME_CLASS(CMyDocument),
RUNTIME_CLASS(CMyMainWindow), // main SDI frame window
RUNTIME_CLASS(CMyView));

AddDocTemplate(pDocTemplate);

CCommandLineInfo cmdInfo;

ParseCommandLine(cmdInfo);

if (!ProcessShellCommand(cmdInfo))
return FALSE;

Question 1 :: I coudnt understand the code written after AddDocTemplate method is called.
Why we need to call ParseCOmmandLine and then ProcessShellCommand?

Can I have any web links, which teach how to create single Document Template application without
using the AppWizard.

Thanks, Jell