Generate and display a form at runtime : - this demo application shows how to dynamically create a form at run time , add controls to the newly created form , and capture events for those controls , using vb code only 这个演示程序展示了在运行时，如何动态地创建一个窗体，给新创建的窗体增加控件，以及为那些控件捕获事件，只使用了vb代码。
Common dialog control demo for beginners - this demo for beginners shows you how to use the open and saveas common dialog to open files ( in this case , picture files ) and save them with a different extension 这个为初学者设计的演示程序向你展示了，如何使用打开和另存为命令对话框来打开文件(在这个例子中，是图片文件) ，并用不同的扩展名来保存它们。
In chapter three we give a brief introduction to realsystem , then the file format plug - in , the render plug - in and the sdk of realsystem will be detailed . in the end hi chapter four we present an application framework based on mpeg - 4 system and how it will be integrated into the plug - in of realsystem to implement a fgs demo program 最后在第四章给出了一个一般的基于mpeg - 4系统的应用程序框架，然后结合realsystem工作模式，将mpeg - 4系统部分集成在realsystem的文件格式和回放插件中，实现了一个简单的fgs演示程序。
In the first place , the paper briefly discusses issues related to the main index mechanisms in spatial and temporal , studies the access methods of spatio - temporal databases which has been presented . furthermore , the paper explains the storage mechanisms in stadbs ( spatio - temporal analysis database system ) and presents a hr - tree index structure based on main memory to realize the index mechanism of stadbs , it ' s main technologies were discussed in detail . lastly , a visual demo of hr - tree based on main memory was introduced in this paper 本文在分析讨论了主要的空间和时间索引技术的基础上，研究、分析了时空数据的存取方法，对已提出的时空索引技术进行了分类、比较；根据时空分析数据库stadbs存储机制的特点，采用基于主存的hr -树作为stadbs时空数据的索引结构，设计与实现了stadbs的时空存取方法，论文对stadbs时空索引机制的设计与实现作了较详细的介绍，同时阐述了基于主存的hr -树可视化演示程序的主要实现方法。
