Qt Code: 
  1. #ifndef MYCTRL_H
  2. #define MYCTRL_H
  3. #include "crviewer1.h"
  4. #import "C:\\Program Files\\Common Files\\Crystal Decisions\\2.0\\bin\\craxddrt9.dll" no_namespace
  5.  
  6. #include <qwinhost.h>
  7. #include <QtGui>
  8.  
  9.  
  10.  
  11. class HostWindow : public QWinHost
  12. {
  13.     Q_OBJECT
  14. public:
  15.     HostWindow(QWidget *parent = 0, Qt::WFlags f = 0)
  16. 	: QWinHost(parent, f)
  17.     {
  18.         setFocusPolicy(Qt::StrongFocus);
  19.     }
  20. 	~HostWindow()
  21. 	{
  22.         if(m_pCRViewer1)
  23. 		{
  24. 			m_pCRViewer1->DestroyWindow();
  25. 			delete m_pCRViewer1;
  26. 		}
  27. 	}
  28.  
  29.     HWND createWindow(HWND parent, HINSTANCE instance)
  30.     {
  31. 	   CString nn("hello");
  32.  
  33. 	   CWnd* cwnd=CWnd::FromHandle(parent);
  34. 	   CRect rect;
  35. 	   cwnd->GetClientRect(&rect);
  36.  
  37. 	   DWORD nStyle=cwnd->GetStyle();
  38.  
  39. 	   AfxEnableControlContainer();
  40. 	   m_pCRViewer1=new CCrviewer1();
  41. 	   m_pCRViewer1->Create((LPCTSTR)nn, WS_CHILD | WS_VISIBLE , rect, cwnd, 10001 ); 
  42.         m_Application.CreateInstance (__uuidof(Application));
  43. //获取m_Report变量
  44. //staff.rpt为通过向导建立的报表文件，数据库采用SQL Server 7.0
  45.    m_Report =m_Application->OpenReport ("World Sales Report.rpt");
  46.   //设置报表标题
  47.     m_Report->put_ReportTitle (_bstr_t("Title"));
  48.  
  49. 	 m_pCRViewer1->put_ReportSource(m_Report);
  50. 	 m_pCRViewer1->put_DisplayToolbar (TRUE);
  51. 	 m_pCRViewer1->put_DisplayGroupTree (FALSE);
  52. 	  m_pCRViewer1->put_DisplayBorder (FALSE);
  53. 	  //刷新数据
  54. 	  m_pCRViewer1->Refresh ();
  55. 	  //显示报表内容
  56. 	  m_pCRViewer1->ViewReport();
  57. 	   return m_pCRViewer1->m_hWnd;
  58.     }
  59.  
  60. signals:
  61.     void message(const QString &msg, int timeout);
  62.  
  63. public slots:
  64.     void returnPressed()
  65.     {
  66.         QMessageBox::information(topLevelWidget(), "Message from Qt", "Return pressed in QLineEdit!");
  67.     }
  68. public:
  69. 	 CCrviewer1* m_pCRViewer1;
  70. 	 IApplicationPtr m_Application;
  71.      IReportPtr m_Report;
  72.  
  73. protected:
  74. 	/*void resizeEvent(QResizeEvent *e)
  75. 	{
  76. 		QWinHost::resizeEvent(e);
  77.  
  78. 		if (m_pCRViewer1)
  79. 			m_pCRViewer1->MoveWindow(0,0,width(),height());
  80. 	}*/
  81.  
  82. };
  83.  
  84. #endif
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this is lastest code,it worked !
but i have other problem , How can i use MFC class dirct in Qt, and do not to reset main enty? and My Usage is correct ?