MFC下图片保存的截屏程序

void CMy2dClusterView::SaveAsJPG(CString name)
{
//HWND hwnd = ::GetDesktopWindow();
//HWND hwnd = ::GetActiveWindow();
HWND hwnd = this->GetSafeHwnd();
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
CString filename;
filename = name+_T(".jpg");
image.Save(filename);
image.Detach();

::SelectObject(hDCMem, hOldMap);//选入上次的返回值

//释放
::DeleteObject(hBitMap);
::DeleteDC(hDCMem);
::DeleteDC(hDC);
}