Question: How can I delete all data from a table using a join?For example, the SELECT statement would be: SELECT * FROM Master AS A, Detail AS B WHERE A.price

Question: What does it mean when I receive the Java:java.lang.ClassFormatError?I get it whenever I try to implement a ready-made Javaapplication onto my Web site. Answer: The ClassFormatError is thrown whenever

Question: I want to run my applet on a browser, but I do notknow which versions of the following browsers cansupport programs made by JDK1.1 or JDK1.1.1. 1. Netscape: Which

Question: How do I get Java to return the ASCII value of a character? Answer: Java characters are encoded using Unicodes, two-byte codes that enable coding of non-Roman characters. Fortunately,

Question: How can I output straight ASCII text from the Rich Text Box control, and NOT Rich text? Answer: The SaveFile method of the RichTextBox control can be called with

Question: How can I simply get the IP address of a workstation by using Java so that I can display it and run another application ? Answer: The java.net.InetAddress class

Question: My problem is that the main applet serves as a sort of navigator page. When the user clicks a certain mouse xy the applet opens a new window (frame).

Question: Is there a way to log my users’ e-mail addresses using Java? I thought of using a mailto form but the user would have to press a button, making

Question: Here’s some basic Java syntax, with explanations: Answer: OBJECTS, CLASSES and INSTANCESA Java object is a container that holds variables and functions (Java programmers call functions “methods”). Since (references

Question: Can you just bring me up to date on which are the VRML 2.0 compatible browsers? Answer: Oz’s Oz Virtual Sony’s Community Place InterVista’s WorldView RealSpace’s RealVR Traveler Newfire’s

Question: Having programmed in Dbase III Plus and FoxPro for Windows, I have enjoyed working with databases. Do you feel that SQL would be the next logical choice as far

Question: What’s the diference between SDI and MDI Applications? Answer: An SDI, or single document interface,application has a single, floating menu bar. Each form in the applicationhas its own window,

Question: I am having a hard time getting my OPO application to show decent performance. It’s running on a 32MB Win3.1 PC, and queries a Solaris x86 Oracle Server using

Question: In OPO v1.0, it was impossible to redefine a table in a BLAZE database. I assumed this would not be the case with an Oracle Lite database and OPO

Question: Is it possible to use the text ODBC driver in OPO v2.0 for this purpose by opening two sessions — one connected to an Olite database while the other

Question: Is there a way to enable and disable fields inside a repeater display depending on the values of fields on the master form?I have tried it various ways (on

Question: Power Objects to Oracle 7 server query…I thought this would be straightforward. I havea simple query to perform when the button isclicked — find and load info. on this

Question: I have a number of databases – filemaker, DBase, ASCII and CAD drawings. We want to convert everything to one database. Is this possible? What are some initial steps

Question: I need to change sound volumes (wave, midi, cd,line-in etc..) in Win95. How can I do it?Any Win32API functions I should call? Answer: I haven’t used this unit to

Question: I would like to begin by saying your site is great. I have used Ask the VB Pro in the past, so I hope you can help with this

Question: Is drag-and-drop on a menu item possible? Answer: If I was going to be rhetorical, I’d answer in very Zen-like terms:”Anything is possible.” But in more practical terms, no,

Question: How do you use the CreateToolbarEx function? I want to use it to create dockable tool bars. Answer: With CreateToolBarEx, you’re walking into real low-level stuff that willrequire that

Question: I want to see which users are logged on to the local area network through my Delphi application.I would like to know how I can call up the Windows

Question: As you know, when you create .db tables with referentialintegrity (i.e. Paradox or Desktop), this makes detail records that dependon the master. When you want to delete records in

Question: Is there a way to reset the net and lock files that an application develops withouthaving to shut down the software? Even a temporary pause would be acceptable. We

Question: I am trying to perform multiple queries, and to speed things up I want to perform a query on the result of a previous query. Is there an easy

Question: I’m trying to teach myself Delphi 2 and have no programming experience. I’m stuck on a simple problem. How do you bring up the About box from the About

Question: Can the drop-down items for a DBLookupComboBox be populated from the results of a TQuery? Answer: Yes, a query can act as the data source for a TDBLookupCombo. You

Question: When a user clicks on an item in a list box, how can I get the actual string that was clicked on? For example, if ‘dog,’ ‘cat,’ and ‘fish’