自己写了一个CMyButton类 可是用的时候CPU却占用90%以上
主窗口原来不调用它的时候CPU占用为0，只要调用它就到90%以上了，找不出原因，因为只剩AfxRegisterWndClass 和Create这两个必要的创建窗口函数都会跳到90%。。为什么啊，VC里面自带的按钮却不会。。。
CMyButton类：

C/C++ code

CMyButton::CMyButton(CWnd *parewnd,UINT buttonID,UINT nmapID1,UINT nmapID2,UINT x,UINT y,UINT nwidth,UINT nhigh){//     m_nwidth=nwidth;//     m_nhigh=nhigh;//     m_nmapID1=nmapID1;//     m_nmapID2=nmapID2;    RECT rect;    rect.left=x;    rect.top=y;    rect.right=x+nwidth;    rect.bottom=y+nhigh;     LPCTSTR lpszClassName=AfxRegisterWndClass(0,0,(HBRUSH)(COLOR_BTNFACE+1),AfxGetApp()->LoadStandardCursor(IDC_ARROW));     Create(lpszClassName,0,WS_CHILD|WS_VISIBLE,rect,parewnd,buttonID);    //::CreateWindow(lpszClassName,"mybutton",WS_CHILD|WS_VISIBLE,x,y,nwidth,nhigh,hparewnd,0,AfxGetInstanceHandle(),0);}

C# code

BOOL CBabyDlg::OnInitDialog(){    CDialog::OnInitDialog();    // Add "About..." menu item to system menu.    // IDM_ABOUTBOX must be in the system command range.    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);    ASSERT(IDM_ABOUTBOX < 0xF000);    CMenu* pSysMenu = GetSystemMenu(FALSE);    if (pSysMenu != NULL)    {        CString strAboutMenu;        strAboutMenu.LoadString(IDS_ABOUTBOX);        if (!strAboutMenu.IsEmpty())        {            pSysMenu->AppendMenu(MF_SEPARATOR);            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);        }    }    CMyButton *m_mybutton=new CMyButton(this,11,IDB_BITMAP2,IDB_BITMAP2,52,21,22,18);//在这里调用    CDC  *pDC;    //CRect wndrect;    //CDC memdc;    CRgn deletergn;    CBitmap membitmp;    BITMAP bitmap;    COLORREF cl;    POINT point;    pDC=GetDC();    m_memdc.CreateCompatibleDC(pDC);    membitmp.LoadBitmap(IDB_BITMAP1);    m_memdc.SelectObject(&membitmp);    membitmp.GetBitmap(&bitmap);    ::SetWindowPos(m_hWnd,HWND_TOP,0,0,bitmap.bmWidth,bitmap.bmHeight,SWP_NOMOVE);    GetWindowRect(&m_wndrect);    m_wndrgn.CreateRectRgn(0,0,m_wndrect.Width(),m_wndrect.Height());    //ShowWindow(1);    for(int x=0;x<m_wndrect.Width();x++){        for(int y=0;y<m_wndrect.Height();y++){            point.x=x;            point.y=y;            cl=m_memdc.GetPixel(point);            if(cl==0){                deletergn.CreateRectRgn(x,y,x+1,y+1);                m_wndrgn.CombineRgn(&m_wndrgn,&deletergn,RGN_XOR);                deletergn.DeleteObject();            }        }    }    x=1;    SetWindowLong(m_hWnd,GWL_STYLE,GetWindowLong(m_hWnd,GWL_STYLE)|WS_SYSMENU);    SetWindowRgn((HRGN)m_wndrgn,1);    // Set the icon for this dialog.  The framework does this automatically    //  when the application's main window is not a dialog    SetIcon(m_hIcon, TRUE);            // Set big icon    SetIcon(m_hIcon, FALSE);        // Set small icon    SetWindowText("baby");    m_closebutton.ModifyStyle(0,BS_BITMAP);    m_buttonmap.LoadBitmap(IDB_BITMAP2);    m_closebutton.SetBitmap(HBITMAP(m_buttonmap));    // TODO: Add extra initialization here        return TRUE;  // return TRUE  unless you set the focus to a control}