如果您的系统提示“找不到mfc120d.dll12.0.20827.3”或“mfc120d.dll12.0.20827.3缺失”或者“mfc120d.dll12.0.20827.3错误”等等，请不用担心，请直接下载mfc120d.dll到本机上。mfc42.dll使用方法：(1)下载文件mfc120d.dll12.0.20827.3文件到您的桌面上。(2)将mfc120d.dll12.0.20827.3文件放到提示丢失的文件的程序目录下。(3)如果第2步是行不通的。将文件mfc120d.dll12.0.20827.3到系统目录下。C:WindowsSystem(Windows95/98/Me)C:WINNTSystem32(WindowsNT/2000)C:WindowsSystem32(WindowsXP,Vista)C:WindowsSystem32(Windows7/8/2008r2)C:WindowsSysWOW64(Windows7/8/2008r2)