这是一个PDF文件查看的程序，它的功能类似于Acrobat Reader，但是比它小得多。它可以嵌入到你自己的程序中，成为你的程序的一部分功能。-This is a PDF file View the procedures, the function similar to the Acrobat Reader, But much smaller than it. It can be embedded into your own process, you become part of the pr