Question: I am writing a program that needs to keep a running total of ID numbers allocated for this reason. The ID numbers are in an auto-increment field. I need

Question: How do you select the maximum value of a column in a DBGrid when displayed through a query? (query SQL:select max(CustNo) from customer, and get error message:”the table is

Question: I read somewhere that Object Pascal, the language used in Delphi, does not support multiple inheritance. Is this true? Answer: Yes, this is true. Object Pascal’s inheritance model follows

Question: In my Delphi 1.0 application, when I open a form (e.g. ClientForm.Show) I get an error message: “Error creating window.” This error occurs when several forms (nine or ten

Question: I developed a database using AS400 components. Everything compiled and it was working for awhile. I have not changed anything in the project and now whenever I close the

Question: I am looking for a good introduction book to Delphi. I know Turbo Pascal, but I am still a beginner in the field of OOP and in the field

Question: I want to compute the number of the week. Thanks in advance PLM Answer: This is pretty basic stuff. If you want the current week of the month, a

Question: How can I expose the ItemData property of a ListBox to use it for storing longint data that corresponds to each item in the list in Delphi 3.0? I

The Standard Library supplies the class template auto_ptr which automatically deallocates heap memory. Likewise, local objects are reclaimed in case of exiting their scope or during “stack unwinding” caused by

It is not uncommon for C++ code fragments to be called by non-C++ programs such as a C-based communication software, COBOL based TP monitors and the likes. However, global functions

Operator new throws an exception of type std::bad_alloc when it fails to allocate the requested amount of memory. Yet in some circumstances, or due to performance considerations, throwing an exception

A class can declare external functions or other classes as friends. Friendship grants full access to all of the grantor’s members, even private and protected ones: void encrypt (string &

Question: How do I display a quote through scripts? For example, I want to print the quotes in a line but JavaScript reads the quotes as part of the coding.

Question: How can I change the color of a URL link when the mouse passes over the link? I am using Netscape version 3.0. Answer: Unfortunately, you need to have

Question: How do I make my date and time JavaScript Y2K compliant? Thank you. Answer: To the best of my knowledge, JavaScript, the language, is already Year 2000 compliant. Internally

Question: I need a script that will allow users to search their hard drive for a file that they can send me. If you can help, I’d appreciate it! Thanks.

Question: Is there a product to convert Microsoft Access 2.0 applications to Visual Basic 5.0 applications? Answer: Unfortunately, Access forms are significantly different than Visual Basic forms (in any version,

Question: I have recently bought a scanner and now have the capability to put pictures on my computer. How do I save pictures in JPEG format instead of bmp format.

Unsigned integers are sometimes unavoidable, like when dealing with raw binary data. A good example is a mail server reading an incoming binary stream. But more often than not, the

Standard C++ supports templates’ template arguments. For instance, a mail server class can store incoming messages in a vector of vector(s) of bytes: vector< vector > vmessages; Please note that

Traditionally, structs serve as data aggregates. However, in C++ a struct can have constructor(s), destructor and member functions just like a class. The only difference between the two is the

A derived class may hide a member function declared in its base class by using the same function name, but with a different signature, or list of arguments. Usually, this

When designing a class, you should remember that one day it may serve as a base class for other classes. When deriving a class from a base, the base’s destructor

Question: Is there a method that will prevent a user from going back to the previous page without modifying the browser code? (Does it matter if it is a CGI

Question: We have trademark symbols sprinkled in our HTML Although MSIE 4.0 has no trouble with it, some browsers cannot interpret [ampersand]trade”. We try to replace them with the ASCII

Question: I am writing a server written in Java that needs to take input from a game written in Visual Basic and sends the output to clients on the Internet.

Question: Am implementing a network simulation program thatrequires a sender and receiver thread, with a frame object being passed between the two threads.Could you suggest a way of connecting the