關於DC和Bitbit函式
https://blog.csdn.net/shellching/article/details/18405185
https://blog.csdn.net/yongyu211/article/details/7722477
http://www.cnblogs.com/08shiyan/p/6843097.html
4種DC之間的區別
https://blog.csdn.net/liuy_yy/article/details/7192555
CreateCompatibleBitmap函式的使用
http://www.cnblogs.com/zhangq/p/4210912.html
https://www.cnblogs.com/open-fu/p/3337810.html
https://blog.csdn.net/foreverhuylee/article/details/22175025
GetWindowRect和GetClientRect的區別詳解
https://www.cnblogs.com/wb-DarkHorse/archive/2013/07/08/3178201.html
CDC類：
https://blog.csdn.net/c_base_jin/article/details/52517948
之後整理
關於FindWindow的使用
https://blog.csdn.net/mjlsuccess/article/details/9227785
關於GetWindowLong
https://blog.csdn.net/hnhyhongmingjiang/article/details/2154410
通過HWND獲得CWnd指標
https://www.cnblogs.com/mars9/archive/2012/01/20/2327941.html
關於HBITMAP和BITMAP
https://blog.csdn.net/hnust_xiehonghao/article/details/37656281
SelectObject函式詳解
https://www.cnblogs.com/killgod/archive/2013/01/22/2872007.html
IPicture、BITMAP、HBITMAP和CBitmap的關係
http://www.cnblogs.com/lidabo/p/3707309.html
CBitmap類：