GET App 

 AfxGetInstanceHandle()  

 AfxGetApp()  

GET Frame->View->Document 
    SDI    AfxGetMainWnd() -> GetActiveView() -> GetDocument()  
    MDI    AfxGetMainWnd() -> MDIGetActive() -> GetActiveView() -> GetDocument()  
GET Menu 
      CMenu *pMenu=AfxGetApp()->m_pMainWnd->GetMenu();  
GET ToolBar,StatusBar 
       (CMainFrame *)GetParent()->m_wndToolBar;  
       (CMainFrame *)GetParent()->m_wndStatusBar;  
       CStatusBar * pStatusBa=(CStatusBar*)AfxGetMainWnd()->GetDescendantWindow(AFX_IDW_STATUS_BAR);  
       CToolBar * pToolBar=(CtoolBar*)AfxGetMainWnd()->GetDescendantWindow(AFX_IDW_TOOLBAR);  
Get View from Document 
       GetFirstViewPosition()  和  GetNextView()  函数得到指针。

获取文档示例:

  

CMainFrame* pMainFrame = (CMainFrame*)AfxGetMainWnd();
CmyDoc* pDoc = (CmyDoc*)pMainFrame->MDIGetActive()->GetActiveView()->GetDocument();
05-28 16:52