The standard class string (unlike MFC CString for example) doesn’t have a char * conversion operator for two reasons. First, implicit conversions can cause undesirable surprises when you least expect

You can pass information via the URL very easily. This process is called passing information via the Query String. The Query String is the bit of information that is on

Java makes exception handling a piece of cake compared to the exception handling mechanisms in languages like C++. Exceptions in Java are mostly managed by the runtime environment and do

Ever since browsers started multiplying, Web designers have wanted to take advantage of new capabilities without breaking the page for users of older browsers. To use image rollover effects safely,

The Singleton pattern ensures that only one instance of an object is instantiated at run time and that this instance is accessible from a well-known access point. You can change

Question: We are using Visual Basic 6.0 Enterprise, Remote Data Services (RDS) 2.0, Internet Explorer (IE) 4.0, Internet Information Server (IIS) 4.0, and Secure Socket Layer(SSL) 3.0. In RDS 2.0,

Question: I am looking for a way to get a telephone number off an ISDN card and into a Visual Basic 5.0 application. Can you help me? If you can’t

When defining a style with multiple font properties, you can save space and enhance readability by collapsing the font attribute values into a concise notation. A restriction of using this

The Web has long provided a way to embed an e-mail address in a clickable link with the mailto: tag. However it didn’t take long for spammers to develop robots

Web authors have come to depend on HTML entities (those strings that begin with & and end with ;) to represent special characters (from ISO 8859-1 Latin-1). Microsoft Internet Explorer

To squeeze maximum efficiency out of Internet Information Server (IIS) 4.0, you may want to look at the amount of cache provided to each ASP thread. The default value for

Java provides a construct that offers functionality similar to inline functions in C++. In Java, this feature is provided by static intializers. Static initializers are blocks of code within a

Designing a class for an application involves identifying and defining its behavior and state. The behavior is defined in the form of methods that the class provides. Often, in the

If you set the ListIndex property of a list-box or combo-box control, VB might generate an unwanted Click event. Instead of writing code to bypass the Click event, use SendMessage

To explicitly erase the contents of a string object, you can use the member function erase(): void f(){ char key; string msg = “press any key to continue”; cout

Many VB programmers use the Option Explicit statement to make sure each variable has been explicitly declared before using it. This means you’ll always notice a misspelled variable, which if

If your app uses temporary files, store the file name(s) in the Registry as you create them. When you exit the program, delete the temporary file and its related Registry

You can access the topmost element (the one pushed the latest) of a stack container by using the member function top(): #include #include #include using namespace std;void main() { stack

This code creates a smart input box. Every time you type something into this text box, the first letters of your string are compared against the members of a hidden

By default, iostream objects display bool variables as 0 and 1. You can override the default setting by inserting the formatting flag boolalpha to the object stream. Consequently, the symbolic

The operator dynamic_cast comes in two flavors: one uses pointers and the other uses references. Accordingly, dynamic_cast returns a pointer or a reference of the desired type when it succeeds.

You’ve probably noticed that the display time stops when an application pops up VB’s built-in MsgBox. Although the system timer continues to tick, the timer control isn’t updated every second,

You can simplify Win32 APIs by using enumerated types instead of constants. When you use enumerated types, VB provides you with a list of values when you define the API

Reflection plays an essential role in adding dynamism to Java. Using reflection, an application can dynamically (i.e., at run time) determine the state and behavior of any class. Reflection allows

The operator typeid returns a const type_info object associated with its argument. However, the returned object is a temporary one, so if you have to call several member functions from

Cascading Style Sheets (CSS) provide a good way to apply a style sheet to a section of text. With CSS, you can redefine how HTML tags work, for example making

For some reason, Microsoft Internet Explorer installs over any previous or later versions of itself, so it is difficult to test your page on Internet Explorer 3, 4, and 5

Standard C provides two functions for the purpose of random number generation–rand and srand. The function rand generates a sequence of pseudo-random numbers. The term pseudo-random implies that the generated

Due to limited space on a form, you sometimes must keep the width of combo boxes small. Because a combo box lacks a horizontal scrollbar, some text might remain hidden.

Who said arrays in VB can’t change all dimensions while preserving data? I call this the “variable dimensions array,” and I use it when applications need data arrays with more