MFC ocx GetDlgItem的问题

[我是学友]

我用MFC写了个ocx插件
在一个界面上拖了几个button 和一个animate control 控件
然后重写了OnShowWindow消息，但是有个问题，在这个函数里调用button的句柄都可以，但是animate control的不行

//控件调整大小位置在这个消息内
//
void DialogMain::OnShowWindow(BOOL bShow, UINT nStatus)
{
    CDialog::OnShowWindow(bShow, nStatus);

    // TODO: 在此处添加消息处理程序代码
    
    //五个按钮组成的区域是一个整体，相对坐标为0 0
    //各个按钮缝隙为5

    int X = 0 + 825;      //初始875
    int Y = 0 + 150;      //初始150

    //位置和大小
    CWnd *pWnd = GetDlgItem(IDC_BUTTON_UP);
    pWnd->SetWindowPos(NULL,X+55,Y,50,50,NULL);

    pWnd = GetDlgItem(IDC_BUTTON_LEFT);
    pWnd->SetWindowPos(NULL,X,Y+55,50,50,NULL);

    pWnd = GetDlgItem(IDC_BUTTON_RIGHT);
    pWnd->SetWindowPos(NULL,X+110,Y+55,50,50,NULL);

    pWnd = GetDlgItem(IDC_BUTTON_DOWN);
    pWnd->SetWindowPos(NULL,X+55,Y+110,50,50,NULL);

    pWnd = GetDlgItem(IDC_BUTTON_AUTO);
    pWnd->SetWindowPos(NULL,X+55,Y+55,50,50,NULL);

    //加载图片
    HBITMAP hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP_UP));
    CButton *cbutton = (CButton *)GetDlgItem(IDC_BUTTON_UP);
    cbutton->SetBitmap(hBitmap);

    hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP_LEFT));
    cbutton = (CButton *)GetDlgItem(IDC_BUTTON_LEFT);
    cbutton->SetBitmap(hBitmap);

    hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP_RIGHT));
    cbutton = (CButton *)GetDlgItem(IDC_BUTTON_RIGHT);
    cbutton->SetBitmap(hBitmap);

    hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP_DOWN));
    cbutton = (CButton *)GetDlgItem(IDC_BUTTON_DOWN);
    cbutton->SetBitmap(hBitmap);

    hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP_AUTO));
    cbutton = (CButton *)GetDlgItem(IDC_BUTTON_AUTO);
    cbutton->SetBitmap(hBitmap);


    //加载背景图片
    CBitmap bmp;  
    bmp.LoadBitmap(IDB_BITMAP_BK);
    m_brush.CreatePatternBrush(&bmp);  


    PIC = GetDlgItem(IDC_ANIMATE_VIDEO);

}

我加了断点调试


莫非是在这个消息里animate control还未被加载？还是animate control需要单独的声明？大神指点一下

[oyljerry]

这个控件ID是否正确，没有取到控件句柄？

[我是学友]

引用 1 楼 oyljerry 的回复:

这个控件ID是否正确，没有取到控件句柄？

找到原因了，要这一句执行完下一句做断点才能看到句柄的值