从指定目录动态加载图片到picturebox

    HBITMAP bmpHandle = (HBITMAP)LoadImage(NULL,
        strPath,
        IMAGE_BITMAP,
        0,
        0,
        LR_LOADFROMFILE);
    CBitmap bmpPicture;
    CDC mdcPicture;
    CBitmap *bmpFromHandle = bmpPicture.FromHandle(bmpHandle);

    CRect rctPicture;
    m_picSelect.GetWindowRect(&rctPicture);

    mdcPicture.CreateCompatibleDC(&dc);
    CBitmap * bmpPrevious = mdcPicture.SelectObject(bmpFromHandle);

    ScreenToClient(&rctPicture);

    dc.BitBlt(rctPicture.left, rctPicture.top,
        rctPicture.Width(), rctPicture.Height(),
        &mdcPicture, 0, 0, SRCCOPY);

    dc.SelectObject(bmpPrevious);
    DeleteObject(bmpHandle);