Teach Yourself Borland C++ in 14 Days - portal

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484 Day 13 Figure 13.4. Your new Web browser at runtime. Summary Today you have learned the purpose of each of the components on the Internet page of the C++Builder Component Palette. You have learned the process involved with taking one of these components, the THTML control, and using it to build an Internet utility—in this case, a Web browser. If you wanted to build an e-mail client or a newsreader, the process would be much the same. C++Builder’s component-based architecture allows you to focus on what you want to build rather than on how to build it. Workshop The Workshop contains quiz questions to help you solidify your understanding of the material covered and exercises to provide you with experience in using what you have learned. You can find the answers to these quiz questions in Appendix A, “Answers to Quiz Questions.” Q&A Q Who authored the Internet components that ship with C++Builder? A Borland licensed C++Builder’s Internet components from NetManage. Q If I already have Microsoft Internet Explorer 3.0 installed, is there a way I can utilize it in my browser application rather than the NetManage HTML control? A Yes—to do so, follow these steps: 1. Select Component | Install from the C++Builder main menu. 2. Click the OCX button.
Quiz Building Internet Applications 3. When the Import OLE Control dialog box appears, select Microsoft Internet Controls in the Registered Controls list. 4. Make sure the Palette page entry is set to Internet so that the new control will be installed onto the Internet page of the C++Builder Component Palette. 5. Click OK and then click OK again. You should see a new control named TWebBrowser on the Internet page of C++Builder’s Component Palette. This is the Microsoft Internet Explorer 3.0 browser implemented as an OLE control. Browser applications that you build using it will have the same basic functionality as Microsoft Internet Explorer 3.0 itself. 1. What C++Builder component would you use to build your own Internet newsreader application? 2. What event is fired by the THTML control before a document is retrieved? 3. What property of the THTML control contains the address of the current Web page? 4. What component would you use to construct an FTP utility? Exercises 1. Change the browser you created today to use the Microsoft Internet Explorer 3.0 OCX control instead. 2. Construct a C++Builder application that allows you to subscribe and post to newsgroups. 3. Construct a C++Builder exception handler than sends e-mail when an application exception is thrown. 4. Construct server and client WinSock applications that talk to one another using the TCP component. 5. Build an application that automatically attaches to a given FTP site and downloads any files that you don’t already have. 485 13
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At a Glance At A Glance WEEK 1 In W
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Day 1 Getting Your Feet Wet Week Ge
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Getting Your Feet Wet but you need
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Getting Your Feet Wet An object, li
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Listing 1.3. WRAPME.CPP. Getting Yo
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Getting Your Feet Wet Operator Desc
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Day 2 Wading In Deeper Wading In De
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Listing 2.1. FORLOOP.CPP. Wading In
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Wading In Deeper for (int i=0;i
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Day 3 Up to Your Neck in C++ Up to
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In Review In Review WEEK 1 You cove
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In Review displayed based on user i
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At a Glance At A Glance WEEK 2 Are
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Day 8 VCL Components VCL Components
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VCL Components C++Builder displays
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VCL Components You can set this pro
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Day 9 Creating Applications in C++B
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Creating Applications in C++Builder
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■ Forms ■ Application ■ C++
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Using the Debugger Day 11 Using the
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Page 501 and 502: Answers to Quiz Questions APPENDIX
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Introduction VCL Explored .........
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