In Java, static variables may be used as flags to maintain state between different instantiations of a class (see Tip: “Using Static Variables to Store State Across Instantiations”). However, the

Question: I want to set up my NT Server as my primary domain server. How do I do it? Answer: Unfortunately, the only way I know to convert a current

Question: When implementing the Microsoft DNA model, it is suggested to create objects with methods only (no properties) to maintain true stateless objects. If an object will only live for

Question: Can we transfer an application from 32 bits to16 bits (PowerBuilder 5.0) without problems ? Answer: The only thing you will have to check for is API calls. The

Question: Is there an easy way to load a datastore with a comma-delimited text file? Answer: Yes, just load the file into memory and do a global search and replace

Question: Is there a way to query NT 4.0 (programmatically or manually) to have it tell me whether it is NT workstation or NT server? Is the answer in the

Question: I’m trying to export a report to Excel with OLE automation. I’m using PB 5.0.2 and Excel 97. I’ve seen countless examples on how to do this (in fact,

Question: How do I add a DOS exe such as ping to a VB program? Answer: If starting another program is what you want, then use the Shell function. The

Question: I have migrated an application from 5.0.03 to 6.5 and continue to get this error when pressing the Run button: Error – 14 – Error opening DLL library kernel.exe

Question: I am trying to write an app that can add local groups to the NT security database on an NT workstation. When I use the netlocalgroupadd() function, I get

Question: I have a program that copies a file from Network Drive W: to Local Hard Drive E: using the CopyFile API Function. From the command line, the program works

When each instance of a class needs access to a value that can vary from one run of the applet or application to the next, but will be constant within

Many CGI programs, such as guestbook programs, require that only one user at a time be allowed to access a data file. You can lock a file with the Perl

Users of Visual InterDev 6 have reported frustrating problems in configuring their data connections while using the Data Environment (DE). Even though you manually edit the Application variables and connection

There are three ways to deal with checked exceptions in Java. First, you can declare that the “callee” method throws them (using the “throws” keyword). You should do this when

Question: How do I make the mouse click in VB 4? It just auto clicks without user inputs in the spot the mouse currently is. Answer: Without having to go

Question: I use ADO with an Oracle database. To get the connection I have to use: dim Adodb as New ADODB.connectionwith Adodb .connectionString = ???? .openend with What do I

Question: I’m a beginner to Visual Basic, and I would like to display in a text box several lines of text. However, when I enter the code under the command

Question: When a textbox or combo box is disabled, the black text within these control becomes grey. I would like to have all the features of disabling these controls, but

If you have the same JavaScript program appearing on several different Web pages, you might want to consider using an external file. That way all the pages can refer to

You accomplish basic file I/O in Java using data streams. The most basic file I/O operations in Java use the functionality offered by these classes: FileInputStreamFileOutputStream If you’re new to

There are several situations when you need to retain the state of a flag between different instances in a program. The standard way to do this is to declare the

You can use the generic algorithm find() to locate an element of a container. The find() algorithm takes three arguments. The first two are iterators that point at the beginning

C and C++ define NULL differently: #define NULL 0; // A typical definition of NULL in C++ #define NULL ((void*)0) // C defines NULL this way Why is it defined

Although most Web servers give you the option of allowing users to view the list of files in a Web site directory, you may not want to show some types

Question: I want to add a simple form to my Web page, but I can’t figure it out. I want a form that lets my users enter text into a

Nested namespaces are useful in large-scale projects, whereby every development team gets a dedicated namespace within the project’s namespace. Nested namespaces reduce the likelihood of name clashes among different teams

The JSlider component can be customized so that its labels, track, and tickmarks (or any combination of the three) are hidden. Unfortunately, there’s no way to turn off the slider

Hide your navigation buttons using DHTML when you don’t need them. Imagine a page with a databound table on it showing ten rows of data. When you’re at the beginning

The Visual Basic Snapshot data object is closely related to the Dynaset data object, but differs in several key respects. Snapshots are stored entirely in RAM on the user’s local