Question: How can you convert Delphi to C++? Answer: I don’t know of any conversion tools out there that do this, though I could be wrong. If you’re using both

‘———————————————————‘ OverwriteHandler class” you can associate this class to a form, using the’ Form property, and all the textbox controls in the’ form will support insert/overwrite mode switching” Usage: Dim

You can create “polymorphic” routines that work with any type of array (except arrays of fixed-length strings, or UDTs) by using Variant parameters. Take for example the following code: Function

Many programmers don’t realize that it is perfectly legal to use the name of a function inside the Function itself, as if it were a local variable. This trick often

If you need a quick-and-dirty About dialog box for your application, that maintains a consistent look with other Windows applications, look no further than the ShellAbout routine in SHELL32.DLL. Using

At times you may want to return a Dos ErrorLevel when closing your VB application. This can be necessary, for example, if the EXE is meant to be called from

The Swing package, which is now a standard API package in Java 2, offers a new timer utility. This utility is implicitly threaded and lets you create as many timer

The SELECT element includes an options array that is accessible from JavaScript. You can use a loop to iterate through this array and count how many choices the user has

In Standard C and C++, the address of the first element past the end of an array can be used in pointer arithmetic. Thus, you can initialize a vector with

The Standard defines a side effect as a change in the state of the execution environment. Modifying an object, accessing a volatile object, invoking a library I/O function, or calling

A common mistake is to initialize static class members inside the constructor body or a member-initialization list like this: class File{ private: static bool locked; private: File(); //

One of the most frustrating aspects of debugging is detecting memory overruns. Some compilers (MS Visual C++ for instance) automatically add “sentry bytes” at the ends of every memory block

The conditional operator,?, is a shorthand for a sequence of if-else statements. Although it has legitimate uses, in many cases programmers tend to misuse it, thereby producing unintelligible and buggy

When you’re working with QueryDef (SQL instructions stored on an MDB database) and open it, DAO loads all the QueryDefs. For example, if you have an MDB with five QueryDefs

These several database functions work together and perform various utility functions, such as checking if fields and tables exist, creating fields and tables, and so on. The interface hides all

For simple Microsoft Access security, set the database password from the Security item under the Tools menu in Access, select Set Database Password, and enter a password. To use the

This code helps test SQL functions or other string-manipulation routines so you can generate random strings. You can generate random-length strings with random characters and set ASCII bounds, both upper

When executing an Oracle stored procedure, use the named parameter convention. In place of this code: OraDatabase.ExecuteSQL _ (“Begin Employee.GetEmpName (:EMPNO, :ENAME); end;”) Use this code:OraDatabase.ExecuteSQL (“Begin Employee.GetEmpName _ (empno=>:EMPNO,

Question: How can I check if the password that a user inputs has at least one numeric character? Answer: The best way to check whether what the user has entered

Question: I want to use a form that contains a set of textboxes and a set of buttons. When I push a button, I want to manipulate the last active

Question: I am developing an application using VBScript and ASP. I wrote this HTML code to be executed on a client’s machine:

Question: I have added a data connection in Visual Interdev. In the Data View I can see all my tables, fields and so on. My database resides on a SQL

Question: When I add a hyperlink to an ASP page, the link appears underlined. How can I remove the underline from the link? I only want the line to appear

Question: We are only able to add one row in the database, using forms in HTML. How can we do multirow operations on the HTML before sending it to the

Question: I am getting this error message: Invalid operator for data type. Operator equals subtract, type equals varchar. What does this mean? Answer: It means you are doing subtraction on

Question: Is there a script that can gauge site visitors’ net connection speed and route them to the proper link? In particular, I’d like to “auto link” my real video

In SQL Server 7.0, dynamic resource allocation lets disk and memory usage scale to meet changing database demands. This flexibility lets SQL Server provide better performance and simplifies managing the

Internet Explorer 5.0 makes printing pages from within your code simple. The print() method is now exposed off the window object in IE5. It presents the print dialog for the

Java uses a big endian data structure, but Intel-based computers and some others use a little endian format. You may run into problems reading binary data saved in little endian

Question: What is the difference between NT servers and NT workstations? Are they different machines or just different operating systems? Answer: NT servers and NT workstations run the same operating