如何用MFC编写一个程序，获得整个屏幕的截图并保存为bmp格式？

代码 大概就是这样 有几个关键函数仔细一下，要是要完整代码呢留言

CDC memDC

CBitmap memBitmap,*pOldBitmap

CWindowDC dc(GetDesktopWindow())

memDC.CreateCompatibleDC(&dc)

int nWidth,nHeight

/* nWidth=GetSystemMetrics(SM_CXSCREEN)

nHeight=GetSystemMetrics(SM_CYSCREEN)*/

CRect rect

GetDesktopWindow()->GetWindowRect(rect)

ClientToScreen(&rect)

nWidth=rect.Width()

nHeight=rect.Height()

memBitmap.CreateCompatibleBitmap(&dc,nWidth,nHeight)

pOldBitmap=memDC.SelectObject(&memBitmap)

// memDC.StretchBlt(0,0,rect.Width(),rect.Height(),&dc,0,0,rect.Width(),rect.Height(),SRCCOPY)

memDC.BitBlt(0,0,nWidth,nHeight,&dc,0,0,SRCCOPY)

BITMAPFILEHEADER BMFhead

BITMAPINFOHEADER BMIhead

BMFhead.bfReserved1=0

BMFhead.bfReserved2=0

BMFhead.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)

BMFhead.bfSize=BMFhead.bfOffBits+nWidth*nHeight*4

BMFhead.bfType=0x4d42

BMIhead.biBitCount=32

BMIhead.biClrImportant=0

BMIhead.biClrUsed=0

BMIhead.biSizeImage=0

BMIhead.biXPelsPerMeter=0

BMIhead.biYPelsPerMeter=0

BMIhead.biCompression=BI_RGB

BMIhead.biHeight=nHeight

BMIhead.biPlanes=1

BMIhead.biSize=sizeof(BITMAPINFOHEADER)

BMIhead.biWidth=nWidth

DWORD dwSize=nWidth*nHeight*4

BYTE *pData=new BYTE[dwSize]

GetDIBits(memDC.m_hDC,(HBITMAP)memBitmap.m_hObject,0,nHeight,pData,(LPBITMAPINFO)&BMIhead,DIB_RGB_COLORS)

CFile file

file.Open("test.bmp",CFile::modeCreate | CFile::modeWrite)

file.Write(&BMFhead,sizeof(BITMAPFILEHEADER))

file.Write(&BMIhead,sizeof(BITMAPINFOHEADER))

file.Write(pData,dwSize)

file.Close()

memDC.SelectObject(pOldBitmap)

MessageBox("绘图完毕")

GetParent()->ShowWindow(SW_SHOW)

1 为屏幕创建设备描述表

hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL)

2 用这个API 来为屏幕设备描述表创建兼容的内存设备描述表

WINGDIAPI HBITMAP WINAPI CreateCompatibleBitmap( __in HDC hdc, __in int cx, __in int cy)

3 获得选定区域坐标

可以做一个矩形框用来选择截取的范围将坐标传回

4 创建一个与屏幕设备描述表兼容的位图

hBitmap = CreateCompatibleBitmap(hScrDC, Width, Height)

5 把新位图选到内存设备描述表中

hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap)

6 把屏幕设备描述表拷贝到内存设备描述表中

BitBlt(hMemDC, 0, 0, Width, Height,hScrDC, nX, nY, SRCCOPY)

7得到屏幕位图的句柄

hBitmap = (HBITMAP)SelectObject(hMemDC, hOldBitmap)

8清空剪贴板，把屏幕内容粘贴到剪贴板上,

EmptyClipboard()

SetClipboardData(CF_BITMAP, hBitmap)

CloseClipboard()

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