WTL 重画CButton DrawItem不响应？该怎么解决

WTL 重画CButton DrawItem不响应？
对话框上   有一个按钮m_btnOK  

class   CMainDlg;

typedef   CImgDialogBase <CMainDlg,   IDB_BITMAP_DIALOG_WAITING>   CImgDialogBaseForMainDlg;

class   CMainDlg   :   public   CImgDialogBaseForMainDlg
,   public   CWinDataExchange <CMainDlg>

{
BEGIN_DDX_MAP(CMainDlg)
DDX_CONTROL(IDOK,   m_btnOK)
END_DDX_MAP()

CImgButton <IDB_BITMAP_BTN_OK_NORMAL,   IDB_BITMAP_BTN_OK_HOVER,   IDB_BITMAP_BTN_OK_DOWN,   IDB_BITMAP_BTN_OK_DISABLED>
m_btnOK;
};


CImgButton   类如下：
template   <UINT   T_NormalBitmapID,   UINT   T_HoverBitmapID,   UINT   T_DownBitmapID,   UINT   T_DisableBitmapID>
class   CImgButton   :   public   CWindowImpl <   CImgButton <   T_NormalBitmapID,   T_HoverBitmapID,   T_DownBitmapID,   T_DisableBitmapID> ,   CButton>
,   public   COwnerDraw <CImgButton <   T_NormalBitmapID,   T_HoverBitmapID,   T_DownBitmapID,   T_DisableBitmapID>   >
{
public:
CImgButton(){}

~CImgButton(){}

typedef   CImgBkgndBase <CImgButton <   T_NormalBitmapID,   T_HoverBitmapID,   T_DownBitmapID,   T_DisableBitmapID> ,   T_NormalBitmapID>   CImgBkgndForImgButton;

typedef   COwnerDraw <CImgButton <   T_NormalBitmapID,   T_HoverBitmapID,   T_DownBitmapID,   T_DisableBitmapID>   >   COwnerDrawForImgButton;

BEGIN_MSG_MAP(CImgButton)
CHAIN_MSG_MAP_ALT(   COwnerDrawForImgButton,   1)
DEFAULT_REFLECTION_HANDLER()
END_MSG_MAP()

void   DrawItem   (   LPDRAWITEMSTRUCT   lpdis   )
{

::MessageBox(   NULL,   _T( "1 "),   _T( "1 "),   IDOK);
}


};


我参照了   http://www.codeproject.com/wtl/WTL4MFC5.asp

在设计器里面，设置了   这个Button的   OWNER_DRAWER属性

但是
DrawItem   不响应

WTL7.5   VS2005

[解决办法]
添加BS_OWNERDRAW样式
[解决办法]
你的DrawItem是虚函数吗？
[解决办法]
增加notify的style看看
还有，这个只在按钮状态发生改变的时候才调用，先hide再show看看