Tip Bank

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Network Authentication

Question: The new java.net.Authenticator class in JDK 1.2 seems to be the answer to generalized user-authentication. Why dogetPasswordAuthentication andrequestPasswordAuthentication both return PasswordAuthentication, butrequestPasswordAuthentication requires a security check? Answer: The getPasswordAuthentication

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Header Records

Question: I am using Visual FoxPro 5. Is it possible when exporting a table to a text file to have the field names exported on the first line of the

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IRQ7 handler

Question: How can I handle in Windows an IRQ7 interrupt, generated by my own measurement device connected to parallel port? It was easy in DOS. Any generic code would be

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Is ‘delete this;’ a good idea?

Question: We have a use counted object with addRef() and removeRef() functions. When the reference count gets to 0, we want the object to be deleted. Is { delete this;

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Simple C++ Dynamic Link Library

Question: I am trying to interface VBA with a C++ DLL. I am very new to C++ programming. I understand the declarations from the VBA side, but I am having

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Versions 5 and 6

Question: Can you have both versions 5 and 6 of FoxPro installed and make applications that work with either versions 5 or 6? I want to make an app for

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How to Build an Online Help System

Question: How do I create an online help system to use in VB6? Answer: Try the HTML Help Workshop that ships with VB. It allows you to create a help

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How to use Properties

Question: I’m trying to set and save user preferences for an application to a local file. The java.util.Properties class looks like what I want, but I don’t understand how to

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What are Lvalues and Rvalues?

An object is a contiguous region of memory storage. An lvalue (pronounced: L value) is an expression that refers to such an object. The original definition of lvalue referred to