基于p2p的文件传输vc++实现的，有很好的参考价值-P2p file transfer based on vc++ to achieve, have a good reference value

在客户端客户区绘制的图元可以同步绘制到服务器上的客户区上，支持撤销和恢复，支持插入文本，多线程、文件传输、断点续传双缓冲画图等。-On the client side of the client area map of yuan can synchronize on the client area of the drawing to the server, support undo and restore, support inserting text, multithreading, file

任意文件转bmp(可改长宽比)，可以实现将文件加密成图像，源码-Any file transfer bmp (can change the aspect ratio), you can achieve the encrypted file into an image, the source

PDF文件转JPG图片(需要安装 adobe acrobat软件)-PDF file transfer JPG images