在对话框中使用CSrollView

BOOL CViewDlgDemoDlg::OnInitDialog(){     CDialog::OnInitDialog();     CRect rectWindow;      GetWindowRect(rectWindow);      CRuntimeClass *pViewClass = RUNTIME_CLASS(CMyScrollView);      CCreateContext * pContext;      pContext = new CCreateContext;      pContext->m_pCurrentDoc = NULL;      pContext->m_pCurrentFrame = NULL;      pContext->m_pLastView = NULL;      pContext->m_pNewDocTemplate =NULL;      pContext->m_pNewViewClass = pViewClass;      CWnd * pWnd = NULL;      pWnd = DYNAMIC_DOWNCAST(CWnd,pViewClass->CreateObject());                                                                                                                 pWnd->reate(NULL,NULL,AFX_WS_DEFAULT_VIEW,CRect(0,0,0,0),this,0,pContext);      delete pContext;      CMyScrollView * pScollView =       DYNAMIC_DOWNCAST(CMyScrollView,pWnd);     pScollView->SetScrollSizes( MM_TEXT, CSize(rectWindow.right -           rectWindow.left-20, rectWindow.bottom -rectWindow.top-100) ); pScollView->MoveWindow(rectWindow.left,rectWindow.top,rectWindow.right - rectWindow.left-20, rectWindow.bottom -rectWindow.top-100,TRUE);      return true;}