GDI Leak in VC++

I have found a GDI leak in our huge application software.

Below is a simple program to test this problem.
The Idea is that the main dialog box opens another dialog box(dialog box A).
If the dialog box A include a bitmap function for a CStatic control,
it will create GDI leak.

Even when I use "DeleteObject(bitmap)".

Have I done some thing wrong ?
Do you have any thoughts?

Thanks.
    

    // Resource File
    ...

    DIALOG_BOXA DIALOGEX 0, 0, 219, 142
    STYLE DS_SETFONT | DS_FIXEDSYS | WS_POPUP | WS_VISIBLE | WS_BORDER
    EXSTYLE WS_EX_STATICEDGE
    FONT 8, "MS Shell Dlg", 400, 0, 0x1
    BEGIN
        DEFPUSHBUTTON   "OK",IDOK,46,121,50,14
        PUSHBUTTON      "Cancel",IDCANCEL,119,121,50,14
        CONTROL         131,RED_LIGHT0,"Static",SS_BITMAP,7,17,80,37
        PUSHBUTTON      "",RED_LIGHT1,7,60,80,37,BS_BITMAP | NOT WS_TABSTOP
    END

    // head file
    Dialog_Box_A: public CDialog
    {
       ...

       CStatic m_static;
       CButton m_button ;

       ...
    }
   

    /////////////////////////////////////////////////////////

    void Dialog_Box_A::DoDataExchange(CDataExchange* pDX)
    {
       CDialog::DoDataExchange(pDX);
       DDX_Control(pDX, RED_LIGHT0, m_static);
       DDX_Control(pDX, RED_LIGHT1, m_button);
    }

    BOOL Dialog_Box_A::OnInitDialog() 
    {
       CDialog::OnInitDialog();

       HBITMAP bitmap ;

       // This will create GDI leak !!!
       bitmap = LoadBitmap ( AfxGetApp()->m_hInstance,BEACON_BIG_RED_ON) ;
       m_static.SetBitmap (bitmap );
       DeleteObject(bitmap);


       // This is OK !!!
       bitmap = LoadBitmap ( AfxGetApp()->m_hInstance,BEACON_BIG_RED_ON) ;
       m_button.SetBitmap (bitmap );
       DeleteObject(bitmap);
       return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
    }