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1.
ActiveX控件是一段可以重复执行的代码,是用ActiveX技术创建的一个或多个对象组成的。主要介绍如何使用VB编写自己的ActiveX控件,以及如何在Authorware中调用它。  相似文献   

2.
ActiveX控件具有与开发平台无关、可重用等特性,使用ActiveX控件可以节省开发者许多时间。通过一个实例,系统、详尽地介绍了使用Delphi2009制作自定义ActiveX控件的过程。该控件制作难度不高,旨在说明Delphi2009中ActiveX控件的设计方法。  相似文献   

3.
介绍在VB程序中用Timer控件创建一个超长时间的计时器对象,将其编译成ActiveX DLL部件,利用代码的可重用性,在其它应用程序中调用。  相似文献   

4.
蒋炳南 《大众科技》2005,(10):49-51
文章介绍了西门子MicroMaster变频器的RS-485通信协议,利用VB6.0中的ActiveX控件(MSComm6.0通信控件)或者VC5.0中的ActiveX控件(MSCOMM通信控件)实现Windows2000下多台变频器与单台PC的串行通信控制,并能实时检测各个变频器的运行状态.  相似文献   

5.
ActiveX控件有着非常强大的功能,在编程中得到了广泛的应用。本文就ActiveX控件进行视频文件的播放作一般性的探讨。  相似文献   

6.
Internet技术的发展为编程人员提供了更广泛的施展身手的空间。早先“Internet应用程序”这个词仅仅只是指一些用FTP协议下载文件或浏览H T M L页面的工具,而如今使用V i s u a lBasic,不仅可以为Internet开发应用程序,而且还可以把Internet技术作为一部分融入大型的解决方案中。本文所要讨论的问题是利用VisualBasic创建在面向Internet的应用中起重要作用的ActiveX组件。例如,你所创建的ActiveX控件可以用于HTML页面;你开发的ActiveX文档可以在Internet浏览器中使用并于其他的组件一起和HTML页面集成起来;另外ActiveX代码组…  相似文献   

7.
本文首先介绍了ActiveX技术,然后从ActiveX文档、ActiveX控件、ActiveX代码组件三个方面阐述了它们在Internet应用程序中的使用,并给出了相应的程序设计步骤的说明和部分程序代码。  相似文献   

8.
巫华芳 《科技广场》2007,(1):151-152
本文简述了PDF和ActiveX的基本特点,详细阐述了用VC 开发基于ActiveX控件的PDF文档阅读器的设计思想、基本方法和具体步骤。  相似文献   

9.
10.
Internet技术的发展为编程人员提供了更广泛的施展身手的空间。早先“Internet应用程序”,这个词仅仅只是指一些用FTP协议下载文件或浏览HTML页面的工具,而如今使用Visual Basis,不仅可以为In-ternet开发应用程序,而且还可以把Internet技术作为一部分融入大型的解决方案中。今天我们所要讨论的问题是利用Visual Basic创建在面向Internet的应用中起重要作用的ActiveX组件。例如,你所创建的ActiveX控件可以用于HTML页面;你开发的ActiveX文档可以在Internet浏览器中使用并于其他的组件一起和HTML页面集成起来;另外ActiveX代码组件(以前被称为OLE服务器),可以被部署在客户端或服务器端的计算机上用于后台的处理。 [Internet的开发环境]。Internet是一个使用TCP/IP协议、全球性的非集中管理的计算机网络。如果去  相似文献   

11.
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.  相似文献   

12.
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.  相似文献   

13.
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.  相似文献   

14.
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.  相似文献   

15.
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China's science enterprise by making S&T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party's Leading-member Group at CAS, which was held from 7 to 11 January in Beijing.  相似文献   

16.
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.  相似文献   

17.
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants."  相似文献   

18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.  相似文献   

19.
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment.  相似文献   

20.
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.  相似文献   

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