MFC框架类互访图

这是针对SDI画的MFC框架类互访图，对于MDI基本上适用。

在SDI中，视图窗口、工具栏、状态栏都是主框架窗口的子窗口。

 

 例子：

从非框架类的CAb访问

 CDrawItApp* pApp = (CDrawItApp*) AfxGetApp ();

 CFrameWnd* pWnd= (CFrameWnd*)pApp->m_pMainWnd;
 pWnd = (CFrameWnd*)AfxGetMainWnd ();

 CDrawItDoc* pDoc = (CDrawItDoc*)pWnd->GetActiveDocument();

 CDrawItView* pView =
  (CDrawItView*)(pWnd->GetActiveView ());

 pDoc = pView->GetDocument ();

 POSITION pos = pDoc->GetFirstViewPosition ();
 pView = (CDrawItView*)pDoc->GetNextView (pos);