将屏幕保存为图片 将当前MFC程序保存为图片 c++ vc

将屏幕保存为图片，使用vs2008编译通过。

#include "stdafx.h" #include <windows.h> #include <atlimage.h> int __stdcall WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { HWND hwnd = ::GetDesktopWindow(); HDC hDC = ::GetDC(hwnd);//获取屏幕DC RECT rect; ::GetClientRect(hwnd, &rect);//获取屏幕大小 HDC hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC HBITMAP hBitMap = ::CreateCompatibleBitmap(hDC, rect.right, rect.bottom);//创建兼容位图 HBITMAP hOldMap = (HBITMAP)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值 ::BitBlt(hDCMem, 0, 0, rect.right, rect.bottom, hDC, 0, 0, SRCCOPY);//将屏幕DC的图象复制到内存DC中 CImage image; image.Attach(hBitMap); image.Save(_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式 image.Detach(); ::SelectObject(hDCMem, hOldMap);//选入上次的返回值 //释放 ::DeleteObject(hBitMap); ::DeleteDC(hDCMem); ::DeleteDC(hDC); return 0; }

 

 

 

 

将当前MFC程序（这里是单文档程序）保存为图片，使用vs2005。第一个使用CImage类保存图片，第二个使用BITMAPINFO。

第一个：

void CMainFrame::OnGetMap() { HWND hwnd = this->GetSafeHwnd(); HDC hDC = ::GetWindowDC(hwnd);//获取DC RECT rect; ::GetWindowRect(hwnd, &rect);//获取屏幕大小 HDC hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC HBITMAP hBitMap = ::CreateCompatibleBitmap(hDC, rect.right-rect.left, rect.bottom-rect.top);//创建兼容位图 HBITMAP hOldMap = (HBITMAP)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值 ::BitBlt(hDCMem, 0, 0, rect.right-rect.left, rect.bottom-rect.top, hDC, 0, 0, SRCCOPY);//将屏幕DC的图象复制到内存DC中 CImage image;//需要#include <atlimage.h> image.Attach(hBitMap); image.Save(_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式 image.Detach(); ::SelectObject(hDCMem, hOldMap);//选入上次的返回值 //释放 ::DeleteObject(hBitMap); ::DeleteDC(hDCMem); ::DeleteDC(hDC); }

 

第二个：

void CMainFrame::OnGetMap() { CDC* pDC = GetWindowDC(); CBitmap bitmap; CDC memDC ; CRect rect; GetWindowRect(rect); memDC.CreateCompatibleDC(pDC); bitmap.CreateCompatibleBitmap(pDC,rect.Width(),rect.Height()); memDC.SelectObject(&bitmap); memDC.BitBlt(0,0,rect.Width(),rect.Height(),pDC,0,0,SRCCOPY); CFileDialog fDlg(FALSE,_T("bmp"),NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,_T("位图文件|*.bmp"),this); if (fDlg.DoModal()==IDOK) { CString bmpfile = fDlg.GetPathName(); CFile file(bmpfile,CFile::modeCreate|CFile::modeWrite); BITMAP bInfo; bitmap.GetBitmap(&bInfo); //计算调色板大小 int panelsize = 0; if (bInfo.bmBitsPixel<24) //非真彩色 { panelsize = pow((double)2,bInfo.bmBitsPixel)*sizeof(RGBQUAD); } //定义位图信息 BITMAPINFO* bMapInfo = (BITMAPINFO*)LocalAlloc(LPTR,sizeof(BITMAPINFO)+panelsize); bMapInfo->bmiHeader.biBitCount = bInfo.bmBitsPixel; bMapInfo->bmiHeader.biClrImportant = 0; bMapInfo->bmiHeader.biCompression = 0; bMapInfo->bmiHeader.biHeight = bInfo.bmHeight; bMapInfo->bmiHeader.biPlanes = bInfo.bmPlanes; bMapInfo->bmiHeader.biSize = sizeof(BITMAPINFO); bMapInfo->bmiHeader.biSizeImage = bInfo.bmHeight*bInfo.bmWidthBytes; bMapInfo->bmiHeader.biWidth = bInfo.bmWidth; bMapInfo->bmiHeader.biXPelsPerMeter = 0; bMapInfo->bmiHeader.biYPelsPerMeter = 0; //获取位图的实际数据 char* pData = new char[bMapInfo->bmiHeader.biSizeImage]; int len = GetDIBits(pDC->m_hDC,bitmap,0,bInfo.bmHeight,pData,bMapInfo,DIB_RGB_COLORS); BITMAPFILEHEADER bFileHeader; bFileHeader.bfType = 0x4D42; bFileHeader.bfReserved1 = 0; bFileHeader.bfReserved2 = 0; bFileHeader.bfSize = sizeof(BITMAPFILEHEADER); bFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+panelsize; //向文件中写入位图数据 file.Write(&bFileHeader,sizeof(BITMAPFILEHEADER)); file.Write(&bMapInfo->bmiHeader,sizeof(BITMAPINFOHEADER)); file.Write(pData,bMapInfo->bmiHeader.biSizeImage+panelsize); file.Close(); delete pData; LocalFree(bMapInfo); } bitmap.DeleteObject(); memDC.DeleteDC(); }