Teach Yourself Borland C++ in 14 Days - portal

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350 Day 9 Quiz Q I’ve got a bunch of old objects in the Object Repository that I don’t use anymore. How can I get rid of them? A Choose Options | Repository from the main menu. The Object Repository configuration dialog box is displayed. To remove an object, first select the object in the Objects list box, and then click the Delete Object button. The object will be removed from the Object Repository. Q I had an object stored in the Object Repository. Now when I try to use that object I get a message box that says Unable to find both a form and a source file. What’s the problem? A You have either moved or deleted the source and/or form file for the object. The Object Repository keeps track of the directory where the object is stored. If you move or delete the object, the Object Repository is unable to find the object and reports an error. Q Can I add objects to the New page of the Object Repository? A No. The New page of the Object Repository is fixed. It cannot be deleted or modified. You’ll have to place your objects on another page. Q I added a function to my main form class. Now I can’t compile. What’s the problem? A You probably added the function declaration to the published section of the class declaration accidentally. Be sure that the declaration for your class is in either the public or the private section of the class declaration. Q I have a resource editor that allows me to decompile resources contained in other programs. This lets me “borrow” bitmaps and other resources from other programs. Is this okay? A The short answer is “No.” You should assume all resources in other programs to be copyrighted material that cannot be freely copied. Consult a lawyer for a qualified opinion. Q I have a lot of bitmaps and sound files that go with my application. Can I put all those resources in a file other than the program’s executable file? A Yes. You can have resources stored in a dynamic link library (DLL). 1. When do you use the Inherit option when selecting an object in the Object Repository? 2. What is the procedure for saving a project to the Object Repository? 3. What happens to inherited forms when you change the base form? 4. Where in the form’s class declaration do you place user function declarations?
Creating Applications in C++Builder 5. Where do you place the function definition (the function itself ) when you add your own functions to C++Builder code? 6. How can you determine who wrote a particular object in the Object Repository? 7. Where do you add and delete pages in the Object Repository? 8. Is it easier to create a basic application from scratch or by using the Application Wizard? 9. What are the two ways you can add a resource file to your project? 10. Can you create a resource script file containing a string table with a text editor? Exercises 1. Create a new form. Add several components of your choosing to the form. Save the form to the Forms page of the Object Repository with the name BaseForm. 2. Start a new application. Choose File | New to view the Object Repository. Switch to the Forms page. Click the Inherit radio button. Choose the BaseForm object you created in exercise 1 and add it to the application. (Be sure you used the Inherit option.) Save the project and close it. 3. Open the BaseForm object you created in exercise 1. Delete all components on the form and save the form. 4. Reopen the project you created in exercise 2. Display the new form you created in that exercise. Note that the components are all gone. (Remember, you inherited this object, so all changes made to the base form were also made to the inherited form.) 5. Choose Options | Repository from the main menu. Delete the BaseForm created earlier. 6. Create a project using the Application Wizard. Use all menu options and make the application an MDI application. Create a speedbar for the application. 7. Add a multipage dialog box to the application you created in exercise 6. Use the Dialog Wizard. 8. Use the Object Repository to add an About box to the program you created in exercise 6. 9. Create a string table resource with a text editor and compile it with the resource compiler (BRCC32.EXE). Extra Credit: Write a program to load the strings and display them on a form. 10. Using a text editor, open the JJRes.rc file from http://www.mcp.com/sams/ codecenter.html and examine its contents. 11. Write “I will not borrow bitmaps from other programs.” 100 times on the blackboard. 351 9
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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 An object, li
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Day 8 VCL Components VCL Components
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Building Internet Applications Day
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C++Builder Extensions to C++ Day 14
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Answers to Quiz Questions APPENDIX
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Day 10 Answers to Quiz Questions 1.
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Symbols & (ampersands), 246 © (cop
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File Save, 309-312 Find/Replace, 31
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A V I A C O M S E R V I C E The Inf
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Add to Your Sams Library Today with
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Overview Introduction Introduction
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Introduction VCL Explored .........
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