如何截屏？

Question

按prinscreen键，在insert键上边，scroll左边
会把全屏幕拷到剪贴班！
然后在画图板程序里粘贴就能看到

Answer 1

得到屏幕DC，多种方法:
CDC *pDC = GetDC(NULL);
CDC *pDC = CDC::FromHandle(::GetDC(::GetDesktopWindow()));
CClientDC dc(NULL);有了屏幕DC之后，就可以画出来了.

Answer 2

得到屏幕DC，多种方法:
CDC *pDC = GetDC(NULL);
CDC *pDC = CDC::FromHandle(::GetDC(::GetDesktopWindow()));
CClientDC dc(NULL);有了屏幕DC之后，就可以画出来了.

Answer 3

CDC MemDc,ScrDc,MemDC1;// 屏幕和内存设备描述表
     CDC* pDC;
     CBitmap ScrBmp;
     MemDc.CreateCompatibleDC(&ScrDc);
     ScrDc.CreateDC("display",NULL,NULL,NULL);
     ScrBmp.CreateCompatibleBitmap(&ScrDc,800,600);
          //屏幕分辨率为800x600
     CBitmap* pOld=MemDc.SelectObject(&ScrBmp);
     MemDc.BitBlt(0,0,800,600,&ScrDc,0,0,SRCCOPY);//拷屏
     MemDc.SelectObject(pOld);
     pDC=GetDC();
     MemDC1.CreateCompatibleDC(pDC);
     CBitmap* pOldB=MemDC1.SelectObject(&ScrBmp);
     //pDC->BitBlt(0,0,200,200,&MemDC1,0,0,SRCCOPY);
 CRect rect;
 GetClientRect(&rect);
 pDC->StretchBlt(rect.left,rect.top,rect.right,rect.bottom,&MemDC1,0,0,800,600,SRCCOPY);
 MemDC1.SelectObject(pOldB);