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本示例描述了虚函数的使用规则和注意事项，并且说明了纯虚函数的意义。(The rule and attention for the virtual function are described in the demo, and the significance of virtual function is presented.)

注意是源码 秒解腾讯游戏防沉迷 解除未满十八岁的 防沉迷QQ什么游戏都有用 解除后 需要等一下在上游戏 未成功可能是 服务期延迟(Second solution Tencent game fatigue relieve fatigue under 18 years old what the game has to use QQ released after the game did not need to wait in the success of the service may be delayed for)

VB实现屏幕上显示3D star，研究VB对3D图形的处理性能。(VB to achieve the screen 3D star, of VB on the 3D graphics processing performance.)

LgxGrid是一款功能强大的表格（报表）控件，使用这个控件，你可以轻轻松松地为你的应用程序创建各种表格用户界面，大大加快你的开发效率，更好地满足你的客户需求。 无论是使用LgxGrid控件开发传统的Windows应用程序，还是开发基于B/S的Web应用程序，都会给你带来意想不到的惊喜! 最新版本新增公式和处理大量数据的功能，打印功能更为完善。 Lgxgrid控件内含详尽的中文帮助文档和C#、VC、VB、ASP.net例程，无论你是初学者还是资深的程序员，Lgxgrid控件都会让你得心应手！ (LgxGrid is a powerful form (report) controls, use this control, you can easily serve your application user interface to create various forms, greatly speed up your development efficiency, to better meet the needs of your customers .)

VB编写的一个有限元计算的例子，内容比较全面，包含网格划分，梁，桁架，热传输等情况的计算，以及后处理的显示。(An example of a finite element calculation written in VB, it is more comprehensive, including meshing, calculation beams, trusses, heat transfer, etc.as well as display after treatment.)

测量平差，对于测绘专业数据处理很有用，特别是c语言的薄弱的同学也有很好的帮助。(Surveying adjustment, for surveying and mapping professional data processing is very useful, especially the weak C language students also have a very good help.)

采用VB6.0编程的MD5加密算法。MD5就是采用单向加密的加密算法，对于MD5而言，有两个特性是很重要的，第一是任意两段明文数据，加密以后的密文不能是相同的；第二是任意一段明文数据，经过加密以后，其结果必须永远是不变的。前者的意思是不可能有任意两段明文加密以后得到相同的密文，后者的意思是如果我们加密特定的数据，得到的密文一定是相同的。(Using VB6.0 programming of MD5 encryption algorithm. MD5 is the use of one-way encryption algorithm, for MD5, there are two characteristics is very important, the first is any two plaintext data encrypted ciphertext, later not to be the same second is an arbitrary piece of plaintext encrypted data, then, the results must always be the same. The meaning of the former is unlikely to have any two plaintext after getting the same ciphertext, which means if we encrypt specific data, the encryption must be the same. )

用VB6编程，用来读取BMP图片的PIXEL资料，做为其他影像处理之用(Using VB6 programming, used to read BMP images, as other image processing purposes)

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说明：  一个功能强大且操作性极强的文件浏览、管理程序，只是界面丑一点。(a powerful and strong operational document browsing, management procedures, interface is ugly.)