老规矩，先贴代码
//.h
class CMyApp:public CWinApp{public: virtual BOOL InitInstance();};class CIconListBox:public CListBox{public: virtual BOOL PreCreateWindow(CREATESTRUCT &cs); virtual void MeasureItem(LPMEASUREITEMSTRUCT lpmis); virtual void DrawItem(LPDRAWITEMSTRUCT lpdis); int AddIcon(HICON hIcon); void ProjectImage(CDC* pDC,LPRECT pRect,COLORREF clrBackColor);};class CMainWnd:public CWnd{protected: int m_cxChar; int m_cyChar; CFont m_font; CRect m_rcImage; CButton m_wndGroupBox; CIconListBox m_wndIconListBox; CStatic m_wndLabel;public: CMainWnd();protected: virtual void PostNcDestroy(); afx_msg int OnCreate(LPCREATESTRUCT lpcs); afx_msg void OnPaint(); afx_msg void OnSetFocus(CWnd* pWnd); afx_msg void OnDropFiles(HDROP hDropInfo); afx_msg void OnSelChange(); DECLARE_MESSAGE_MAP()};class CMyApp:public CWinApp{p
