Private Declare Function GetVersion Lib “kernel32” () As Long’ Returns True is executed under Windows NT,’ False if executed under Windows 95/98Function IsWindowsNT() As Boolean IsWindowsNT = (GetVersion() And &H80000000)

Private Declare Function GetComputerName Lib “kernel32” Alias _ “GetComputerNameA” (ByVal lpBuffer As String, nSize As Long) As Long’ Returns the name of the computer.Function ComputerName() As String Dim buffer As

You can alter the size of the caret (this is the name of the cursor within text boxes, not to be confused with the mouse cursor), for instance to ease

Many VB programmers assume that Visual Basic 5.0 is not capable of creating stand-alone Type Libraries, because the documentation states that when an ActiveX component or control is created, the

Under VB4 Public variables in form and class modules were implemented in the same manner as variables in BAS modules, that is, as direct references to memory locations. This allowed

Global objects, static data members of a class, namespace variables, and static variables in functions reside in static memory. Static objects are allocated by the linker and their address remains

A common technique in Active Server Pages (ASP) is to use server-side code to check that the user has filled in a form. In effect, you submit the ASP page

The Bulk Copy Program is still a handy utility for transferring data in and out of tables in SQL. However, using it properly requires that you learn the various command

Closely related to the issue of internationalization is the java.util.Locale class. An instance of Locale represents a geographic, political, or cultural region, and may or may not correspond to a

Many users of Visual InterDev 6 complain about a dialogue box that pops up while they work offline. Even when using localhost and the internal IP address http://127.0.0.1/ the computer

You may have seen “(Compiled Code)” in a stack trace and wondered why a line number was not displayed instead. This occurs because as of release 1.1.5 of the Java

To implement a quick and easy version of the old “marching ants” line around a control, place two CommandButtons, a Shape, and a Timer control on a form. Then insert

An associative array (also called map or dictionary) is an array for which the index does not have to be an integer. An associative array stores pairs of values. One

The GetDlgCtrlID API, when passed a valid hWnd, returns a value that directly corresponds to the Index property of the Controls collection: Private Declare Function GetDlgCtrlID Lib “user32” _ (ByVal

Double-clicking an icon or file name in Explorer is the standard way of launching an application in Windows. However, if you’re developing an app that uses the ListView control from

Asking users to enter time values can often lead to problems formatting what the user enters. I use this piece of code to create a drop-down list of hours, minutes,

You can easily find out whether your user clicked on OK or on Cancel on a modal dialog. This example also prevents the user from unloading the form, and thereby

In SQL Server 7, a significant change was made to the way nonclustered indexes work when a clustered index exists on a table. In version 6.5, the nonclustered index used

Whenever you are programming in Active Server Pages, make sure that your browser is set to check for a new page every time. Otherwise, you may not see your latest

While attempting to deserialize (or unmarshal) a serialized object instance, you may generate an exception with a message similar to: java.rmi.UnmarshalException: Error unmarshaling return; nested exception is: java.io.InvalidClassException: RMIParm; Local

Name mangling, (the more politically correct term is name-decoration, although it is rarely used) is a method used by a C++ compiler to generate unique names for identifiers in a

Everyone by now is familiar with how to create auto increment keys in SQL Server–just define an integer column with identity (start,increment) and you are set. To create a new

By default, when you define a primary key in the create table statement, it uses a clustered index. However, a clustered key is best used to support queries that return

The GridBagLayout is a flexible layout manager, but is also notoriously difficult to use. Some of the most common and difficult to debug problems occur when the amount of space

Giving yourself enough elbow room to design Web pages can be difficult inside the Visual InterDev environment. However, there’s a little-known feature that greatly expands your screen real estate. Full

Reverse iterators are ordinary iterators except that they invert the semantic of the overloaded ++ and — operators. They are useful when the elements of a container are accessed in

Question: I have JavaScript functions that I’m using in different pages. Is there a way to do a C/C++ type include so I don’t have to replicate the JavaScript code

The new and improved showplan in SQL 7 is certainly prettier and easier to understand than the previous version. However, a better method of focusing on trouble spots is using

A crude but common way of debugging Java programs is to use the public System.out and/or System.err instances of PrintStream to display information: System.out.println(“Entering section A of my code”); One

A sequence adaptor is a container built upon another container that modifies its interface. For example, the container stack is usually implemented as a deque, whose non-stack operations are hidden.