Home > Articles > Programming > Visual Basic

  • Print
  • + Share This
Like this article? We recommend

Step by Step

Begin creating the sample Web UI by following these steps:

  1. Start VB and create a new ActiveX DLL project.

  2. From the Project menu, choose References and check "Microsoft Active Server Pages Object Library." This object library is installed on your PC when you install IIS or PWS. Note that it is possible to use this technique without this ASP object library, but it uses late-binding, which is not desirable.

  3. Give your component a nicer name than Project1 by clicking Properties under the Project menu. Type PublishersWebUI for the Project Name and Project Description.

  4. Change the name of the default class (Class1) to clsWebApp.

  5. Add a new (code) module to the project, and change its name to basGlobal.

  6. In basGlobal, make the following declarations:

  7. Public gAspAppl    As Application
    Public gAspReq     As Request
    Public gAspResp    As Response
    Public gAspServer  As Server
    
    Public gAspSession As Session
  8. In clsWebApp, type the code for the OnStartPage events as follows:
  9. Public Sub OnStartPage(ByRef rScriptingcontext As ScriptingContext)
        Set gAspAppl = rScriptingcontext.Application
        Set gAspReq = rScriptingcontext.Request
        Set gAspResp = rScriptingcontext.Response
        Set gAspServer = rScriptingcontext.Server
        Set gAspSession = rScriptingcontext.Session
    
    End Sub

    If you expose this OnStartPage method, it is called automatically when your class is instantiated from ASP code. Think of it as being similar to a Form_Load event. I stumbled on this quite by accident one day while surfing the net. I don't know where it came from, but it likely has something to do with WebClasses. In any event, it allows our code to grab a reference to the intrinsic ASP objects. As mentioned earlier, there are other ways to get these references, but I like this one best.

  10. Code a public sub procedure in clsWebApp to act as a method that can be called from your ASP code:

  11. Public Sub WebMain()
        Call gAspResp.Write("Hello World.")
    End Sub
  12. And now, run your project. When you run an ActiveX DLL from inside the VB IDE, VB temporarily registers the component and its public classes, and points the registry back to the VB IDE. When another application creates an instance of a class that your application exposes, the source code from the class gets interpreted and run inside the VB IDE. When you stop the application, VB automatically unregisters your component. This behavior is great because it enables you to use all of VB's interactive debugging tools, just as you do when developing Windows apps.

  13. At this point, your component is running and waiting for something to invoke it. To pass control from IIS (or PWS) to your component, you'll need to create one ASP file that creates an instance of the clsWebApp class and calls its WebMain method. (I know I said that this technique is scriptless, and now I'm telling you to create a script file, but this file is so tiny that I don't think it really counts.) Use Notepad to create a file named PubWebUI.asp, and type its contents as follows:

  14. <%
        Dim mWebUI
        Set mWebUI = Server.CreateObject("PublishersWebUI.clsWebApp")
        Call mWebUI.WebMain
    %>
    Or, if you're feeling particularly clever, use this one-line version:
    <% Call Server.CreateObject("PublishersWebUI.clsWebApp").WebMain %>
    sure that you save this script file to somewhere that is reachable by your Web browser, such as: c:\inetpub\wwwroot\PubWebUI.asp.
  15. Finally, run your Web browser, and type the URL for the PubWebUI.asp script file (for example, http://localhost/pubwebui.asp). If everything works as planned, you should see the "Hello World." text displayed in your browser window.

The sequence of the previous processing steps goes something like this: When you type the URL of your script, the Web browser sends a request for this file to the Web server running on your machine. The Web server reads the script file and, because it has an ASP file type, passes the request to the ASP and script-parsing components. When your script's CreateObject command is executed, the registry is searched for a component named PublishersWebUI (which we know points back to the VB IDE). Next, an instance of clsWebApp is created, and because we exposed a method named OnStartPage, it gets automatically called and is passed a reference to the scripting context. Our code then grabs a reference to the intrinsic ASP objects and saves these references in the global variables for later use. Finally, the class's WebMain method is called, which then uses the ASP Response object's Write method to send some simple text back to the browser.

Because we grabbed a reference to all of the intrinsic ASP objects, the VB code is free to use any property or method of these objects, just as VBScript code in an ASP page might. For example, our code can get the contents of form controls, obtain query string parameters, and use session variables.

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020