MultiDoc
1. WinMain()
2. AfxWinMain()
3. CWinApp::InitApplication()
4. CMyApp::InitInstance()
4.1 AddDocTemplate()
4.2 new CMainFrame()
4.3 LoadFrame() -> WM_CREATE
5. ProcessShellCommand()
6. CCmdTarget::OnCmdMsg()
7. _AfxDispatchCmdMsg()
8. CWinApp::OnFileNew()
9. CMultiDocTemplate::OpenDocumentFile()
9. 1 CDocTemplate::CreateNewDocyment()
9.1.1 CDocument* pDocument = (CDocument*)m_pDocClass->CreateObject();
9.2 CDocTemplate::CreateNewFrame()
9.2.1 CFrameWnd* pFrame = (CFrameWnd*)m_pFrameClass->CreateObject();
9.2.2 CMDIChildWnd::LoadFrame()
9.2.2.1 CDocTemplate::CreateView();