使用Ni-visa 操作接口数据，例如com口，并口，或者Lan口-Ni-visa operation of the use of interface data, such as the com port, parallel port, or Lan port

office电子印章，签名验章的实现，支持word,excel等，具有一定参考价值。用于一些信息领域。-user can use ,Electronic seal DEMO achieved to realize the basic functions of electronic visas. E-visa in e-commerce and e-government has important applications.

电子签证插件的相关实现例子。有需求做插件开发的可以下载看看，相当不错的学习资料-Electronic visa related implementation example of the plugin.Demand for plug-in development can download and see, fairly good learning materials