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	<DD><B>10. </B>What is a BDE alias?	<P>	<DT></DT>	<DD>A set of parameters that describes a database connection.	<P></DL><H1><A NAME="HeadingA"></A>Day 17</H1><DL>	<DT></DT>	<DD><B>1. </B>What's the fastest and easiest way to create a database form?	<P>	<DT></DT>	<DD>With the Database Form Wizard.	<P>	<DT></DT>	<DD><B>2. </B>How do you control the order and number of columns that appear in a	DBGrid component?	<P>	<DT></DT>	<DD>With the Columns Editor. (Right-click a DBGrid component and choose Columns Editor	from the context menu.)	<P>	<DT></DT>	<DD><B>3. </B>What component enables you to display a dataset in table format?	<P>	<DT></DT>	<DD>The DBGrid component.	<P>	<DT></DT>	<DD><B>4. </B>How can you add or remove buttons from a DBNavigator?	<P>	<DT></DT>	<DD>By modifying the VisibleButtons property.	<P>	<DT></DT>	<DD><B>5. </B>What component do you use to display BLOB image data?	<P>	<DT></DT>	<DD>The DBImage component.	<P>	<DT></DT>	<DD><B>6. </B>What property is common to all data-aware components?	<P>	<DT></DT>	<DD>The DataSource property (among others).	<P>	<DT></DT>	<DD><B>7. </B>What property is used to select the field that a data component is	linked to?	<P>	<DT></DT>	<DD>The DataField property.	<P>	<DT></DT>	<DD><B>8. </B>Can you rearrange the columns in a DBGrid component?	<P>	<DT></DT>	<DD>Yes. Use the Columns Editor at design time or drag and drop them at runtime.	<P>	<DT></DT>	<DD><B>9. </B>Which component is used to edit and display text fields in a database?	<P>	<DT></DT>	<DD>The DBEdit component.	<P>	<DT></DT>	<DD><B>10. </B>What does BLOB stand for?	<P>	<DT></DT>	<DD>Binary large object.	<P></DL><H2><A NAME="Heading16"></A>Day 18</H2><DL>	<DT></DT>	<DD><B>1. </B>What method do you call to create a database table at runtime?	<P>	<DT></DT>	<DD>CreateTable.	<P>	<DT></DT>	<DD><B>2. </B>What does the Edit method of TTable do?	<P>	<DT></DT>	<DD>The Edit method puts the dataset in edit mode so that records can be modified.	<P>	<DT></DT>	<DD><B>3. </B>What method do you call when you want to apply the changes made to	a record?	<P>	<DT></DT>	<DD>The Post method.	<P>	<DT></DT>	<DD><B>4. </B>How do you create a new data module?	<P>	<DT></DT>	<DD>Through the Object Repository.	<P>	<DT></DT>	<DD><B>5. </B>Is a data module a regular form?	<P>	<DT></DT>	<DD>A data module is very similar to a regular form but not the same.	<P>	<DT></DT>	<DD><B>6. </B>What method do you call to print a QuickReport?	<P>	<DT></DT>	<DD>The Print method.	<P>	<DT></DT>	<DD><B>7. </B>What type of QuickReport band displays the dataset's data?	<P>	<DT></DT>	<DD>A detail band.	<P>	<DT></DT>	<DD><B>8. </B>What component is used to display the page number on a report?	<P>	<DT></DT>	<DD>The QRSysData component can display page numbers, the current date, the current	time, and more.	<P>	<DT></DT>	<DD><B>9. </B>How can you preview a report at design time?	<P>	<DT></DT>	<DD>Right-click the report and choose Preview from the context menu.	<P>	<DT></DT>	<DD><B>10. </B>What is the QRExpr component used for?	<P>	<DT></DT>	<DD>The QRExpr component is used to display the results of an expression (usually	a calculated result).	<P></DL><H2><A NAME="Heading17"></A>Day 19</H2><DL>	<DT></DT>	<DD><B>1. </B>How do you load a DLL using static loading?	<P>	<DT></DT>	<DD>In your calling application declare any functions or procedures contained in	the DLL using the extern keyword. The DLL will automatically load when the application	starts.	<P>	<DT></DT>	<DD><B>2. </B>How do you load a DLL using dynamic loading?	<P>	<DT></DT>	<DD>Use the Windows API function LoadLibrary.	<P>	<DT></DT>	<DD><B>3. </B>How do you call a function or procedure from a DLL that has been loaded	statically?	<P>	<DT></DT>	<DD>Call the function or procedure just as you would call a regular function or procedure.	<P>	<DT></DT>	<DD><B>4. </B>What steps do you have to take to ensure that a function or procedure	in your DLL can be called from outside the DLL?	<P>	<DT></DT>	<DD>The function or procedure must be exported from the DLL. Place the function or	procedure name in the exports section of the DLL.	<P>	<DT></DT>	<DD><B>5. </B>In the case of a DLL that has been dynamically loaded, can you unload	the DLL at any time or only when the program closes?	<P>	<DT></DT>	<DD>You can unload the DLL any time you want (using the FreeLibrary function).	<P>	<DT></DT>	<DD><B>6. </B>What must you do to display a Delphi form contained in a DLL from a	non-Delphi program?	<P>	<DT></DT>	<DD>Create an exported function that the calling application can call. In this function,	create the form and display it. Be sure the function is declared with the stdcall	keyword.	<P>	<DT></DT>	<DD><B>7. </B>What is the name of the keyword used to declare functions and procedures	imported from a DLL?	<P>	<DT></DT>	<DD>The external keyword.	<P>	<DT></DT>	<DD><B>8. </B>How do you add resources to a DLL?	<P>	<DT></DT>	<DD>Link a compiled resource file (.res or .dcr) to the DLL with the $R compiler	directive--for example,	<P></DL><BLOCKQUOTE>	<PRE>{$R Resources.res}</PRE></BLOCKQUOTE><PRE></PRE><DL>	<DT></DT>	<DD><B>9. </B>Does a resource DLL need to contain code as well as the resources?	<P>	<DT></DT>	<DD>No. A resource DLL doesn't need any code.	<P>	<DT></DT>	<DD><B>10. </B>Can a DLL containing resources be loaded statically (when the program	loads)?	<P>	<DT></DT>	<DD>It's possible, but there's rarely any reason to load a resource DLL statically.	You need the return value from LoadLibrary to access resources in the DLL, so you	might as well use dynamic loading for resource DLLs.	<P></DL><H2><A NAME="Heading18"></A>Day 20</H2><DL>	<DT></DT>	<DD><B>1. </B>Must a property use a write method? Why or why not?	<P>	<DT></DT>	<DD>No. You can use direct access instead.	<P>	<DT></DT>	<DD><B>2. </B>Must a property have an underlying data field? Why or why not?	<P>	<DT></DT>	<DD>No, a property doesn't have to have an underlying data field, but most properties	usually do. A property that doesn't store a value is unusual.	<P>	<DT></DT>	<DD><B>3. </B>Can you create a component by extending an existing component?	<P>	<DT></DT>	<DD>Absolutely. That's the easiest way to create a new component.	<P>	<DT></DT>	<DD><B>4. </B>What happens if you don't specify a write specifier (either a write	method or direct access) in a property's declaration?	<P>	<DT></DT>	<DD>The property becomes read-only.	<P>	<DT></DT>	<DD><B>5. </B>What does direct access mean?	<P>	<DT></DT>	<DD>The underlying data member for the property is modified and/or read directly	(no read method and no write method).	<P>	<DD><B>6. </B>Must your properties have a default value? Why or why not?	<DT></DT>	<DD>No, default values for properties are optional. Published properties should have	a default value, though. Properties that are string properties cannot have a default	value (and some other types of properties as well).	<P>	<DT></DT>	<DD><B>7. </B>Does the default value of the property set the underlying data field's	value automatically?	<P>	<DT></DT>	<DD>No, the default value only displays a value in the Object Inspector at design	time. You must set the underlying data member to the default value in the component's	constructor.	<P>	<DT></DT>	<DD><B>8. </B>How do you install a component on the Component Palette?	<P>	<DT></DT>	<DD>Choose Component | Install from the main menu.	<P>	<DT></DT>	<DD><B>9. </B>How do you specify the button bitmap that your component will use on	the Component Palette?	<P>	<DT></DT>	<DD>Create a .dcr file with the same name as the component's source. The .dcr should	contain a 24&#165;24 bitmap with the same name as the component's classname. Be sure	that the .dcr is in the same directory as the .pas file for the component.	<P>	<DT></DT>	<DD><B>10. </B>How do you trigger a user-defined event?	<P>	<DT></DT>	<DD>Just call the event after checking whether an event handler exists for the event:	<P></DL><BLOCKQUOTE>	<PRE>if Assigned(FOnMyEvent) then</PRE>	<PRE>  FOnMyEvent(Self);</PRE></BLOCKQUOTE><PRE></PRE><H2><A NAME="Heading19"></A>Day 21</H2><DL>	<DT></DT>	<DD><B>1. </B>Do Delphi and C++Builder project files have the same filename extension?	<P>	<DT></DT>	<DD>No, Delphi and C++Builder project files do not have the same filename extension.	Delphi projects have a .dpr extension and C++Builder projects have a .bpr extension.	<P>	<DT></DT>	<DD><B>2. </B>Do Delphi and C++Builder form files have the same filename extension?	<P>	<DT></DT>	<DD>Yes. Both Delphi and C++Builder have .dfm filename extensions.	<P>	<DT></DT>	<DD><B>3. </B>Can you use packages from third-party component vendors in both Delphi	and C++Builder?	<P>	<DT></DT>	<DD>In most cases, you can use packages from third-party component vendors in both	Delphi and C++Builder. In some cases, the packages will have to be rebuilt with C++Builder.	Ask the component vendor for packages compatible with C++Builder.	<P>	<DT></DT>	<DD><B>4. </B>Can you open a Delphi form file in C++Builder?	<P>	<DT></DT>	<DD>Yes. You cannot edit the form (add or remove components), but you can view the	form.	<P>	<DT></DT>	<DD><B>5. </B>Can you edit a Delphi form file using the C++Builder Form Designer?	<P>	<DT></DT>	<DD>No, you cannot edit a Delphi form file using the C++Builder Form Designer. However,	you can edit the Delphi form as text by choosing View As Text from the C++Builder	context menu.	<P>	<DT></DT>	<DD><B>6. </B>Can you use a C++Builder source unit in Delphi?	<P>	<DT></DT>	<DD>With the current version of Delphi, you cannot use a C++Builder source unit in	Delphi.	<P>	<DT></DT>	<DD><B>7. </B>Which is better, Delphi or C++Builder?	<P>	<DT></DT>	<DD>Neither Delphi or C++Builder is better. Both have their strengths. It depends	largely on whether you prefer Pascal or C++.	<P></DL><H2><A NAME="Heading20"></A>Bonus Day</H2><DL>	<DT></DT>	<DD><B>1. </B>What control do you use to display Web pages?	<P>	<DT></DT>	<DD>The THMTL control.	<P>	<DT></DT>	<DD><B>2. </B>What control do you use to connect to newsgroups?	<P>	<DT></DT>	<DD>The TNMNNTP control.	<P>	<DT></DT>	<DD><B>3. </B>What is the name of the method used to display an HTML document with	the THTML control?	<P>	<DT></DT>	<DD>RequestDoc.	<P>	<DT></DT>	<DD><B>4. </B>What event is generated when an HTML document has completed loading?	<P>	<DT></DT>	<DD>The OnEndRetrieval event.	<P>	<DT></DT>	<DD><B>5. </B>What control do you use to send email messages?	<P>	<DT></DT>	<DD>The TNMSMTP control.	<P>	<DT></DT>	<DD><B>6. </B>What control do you use to retrieve email messages?	<P>	<DT></DT>	<DD>The TNMPOP3 control.	<P>	<DT></DT>	<DD><B>7. </B>What is the name of the method used to send mail with the TNMSMTP control?	<P>	<DT></DT>	<DD>SendMail.	<P>	<DT></DT>	<DD><B>8. </B>Can you freely distribute the Internet Explorer ActiveX control?	<P>	<DT></DT>	<DD>No, you must obtain a license from Microsoft to distribute the Internet Explorer	ActiveX control.	<P>	<DT></DT>	<DD><B>9. </B>What is the name of the utility used to register ActiveX controls?	<P>	<DT></DT>	<DD>TREGSVR.EXE.	<P>	<DT></DT>	<DD><B>10. </B>What company provides the bulk of the Internet controls that come	with Delphi?	<P>	<DT></DT>	<DD>NetMasters.</DL><H1></H1><CENTER><P><HR><A HREF="../ch21/ch21.htm"><IMG SRC="../button/previous.gif" WIDTH="128" HEIGHT="28"ALIGN="BOTTOM" ALT="Previous chapter" BORDER="0"></A><A HREF="../apb/apb.htm"><IMGSRC="../button/next.gif" WIDTH="128" HEIGHT="28" ALIGN="BOTTOM" ALT="Next chapter"BORDER="0"></A><A HREF="../index.htm"><IMG SRC="../button/contents.gif" WIDTH="128"HEIGHT="28" ALIGN="BOTTOM" ALT="Contents" BORDER="0"></A> </P><P>&#169; <A HREF="../copy.htm">Copyright</A>, Macmillan Computer Publishing. 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