MD5信息摘要计算工具 如果对较大的文件进行MD5计算，会自动出现计算进度条，目前的缺陷是对CPU占用过高。-MD5 message digest computing tool for a large file if MD5 calculation, the progress bar will automatically calculate the current deficiency is the high CPU occupancy.

文件加密C++源代码，对加密进度条进度设置，同时，对文件进行解密。-C++ source file encryption code, the progress bar on the progress of setting encryption, the same time, to decrypt the file.