MFC 文档类和视图类指针获取

单文档SDI：

CHighDriverDoc* pDoc=(CHighDriverDoc*)((CMainFrame*)AfxGetMainWnd())->GetActiveDocument();

CDescreenView* pView = (CDescreenView *)((CMainFrame*)AfxGetMainWnd())->GetActiveView(); 

 

多文档MDI:

 CMainFrame* pFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
 CChildFrame* pChFrame = (CChildFrame*)pFrame->MDIGetActive();
 CDescreenView* pView = (CDescreenView *)pChFrame->GetActiveView();

 CDescreenDoc* pDoc = pView->GetDocument();