是否有比下面的代码更有效的获取Windows桌面拷贝的方法(使用GDI或任何其他库)HDCdcDesktop;HDCdcMem;HBITMAPhbmpMem;HBITMAPhOriginal;BITMAPbmpDesktopCopy;dcDesktop=GetDC(GetDesktopWindow());dcMem=CreateCompatibleDC(dcDesktop);hbmpMem=CreateCompatibleBitmap(dcMem,m_lWidth,m_lHeight);BitBlt(dcMem,0,0,m_lWidth,m_lHeight,dcDesktop,0,0,