扩展了 System.Windows.Forms.PrintPreviewControl 控件。

采用 Reflection 技术，彻底重写了该控件的打印控制过程。

主要为了实现以下功能：

1 隐藏了挺讨人厌的进程窗口。如果打印过程比较短，这个窗口一闪而过，实在不专业。但打印过程较长时，这个窗口是有用的。

2 可以获取打印结果的图形文件（MetaFile）

3 可以获取打印结果的总页数



另外，初学者通过此源代码，了解到 .Net 程序的元数据原理，以及强大到无所不能的 .Net 反射技术。-System.Windows.Forms.PrintPreviewControl expanded control. Reflection using technology, a thorough rewrite of the printing control process control. In order to achieve the following main functions: 1 to hide the window rather讨人厌process. If the printing process is relatively short, this window flash, and it is not professional. However, the longer the process of printing, this window is useful. 2 can access the graphics file to print the results (MetaFile) 3 can get the total number of pages to print the results of addition, the beginner through the source code, understand that. Net procedural principle of meta-data, as well as to the almighty powerful. Net reflection technology .