高效地获取Windows桌面的屏幕截图

有没有比下面的代码更有效的方式获得Windows桌面（使用GDI或任何其他库）的副本

HDC dcDesktop; HDC dcMem; HBITMAP hbmpMem; HBITMAP hOriginal; BITMAP bmpDesktopCopy; dcDesktop = GetDC( GetDesktopWindow() ); dcMem = CreateCompatibleDC( dcDesktop ); hbmpMem = CreateCompatibleBitmap( dcMem, m_lWidth, m_lHeight ); BitBlt( dcMem, 0, 0, m_lWidth, m_lHeight, dcDesktop, 0, 0, SRCCOPY ); // Copy the hbmpMem to the desktop copy GetObject(hbmpMem, sizeof(BITMAP), (LPSTR)&bmpDesktopCopy);