JDK 1.2 includes a new library of data structures called Collections. The Collections API contains object collection data structures. The Collection interface is the root interface for all the Collection

The Visual InterDev 6 Grid design-time control (DTC) is a great timesaver. However, sometimes you need to change elements on the fly according to user actions. For instance, your normal

Here is a simple function you can use to connect to SQL Server. This function attempts to connect to the server either using the default SQL Server authentication or Windows

Besides using a BEGIN DISTRIBUTED TRANSACTION statement, another way to instruct SQL Server to participate in a distributed transaction and inform the Microsoft Distributed Transaction Coordinator (MS DTC) of that

The Swing Timer is a useful utility offered by the java.swing package in JDK 1.2. This code snippet shows how to use the timer in an application: 1. ActionListener listener

An HTML form usually looks like this: where you have to specify the action within the Form tag, thus limiting a “post” method to only one destination. However, the JavaScript

Question: How can I undelete a record from a Paradox table? Answer: You can’t. Period. When you delete a record from a Paradox table, its space still exists, but its

Question: In your answer to my previously posted topic, “Changing label captions in FOR loop,” you suggested I use “Sleep.” When I used it, the loop slowed down but didn’t

Question: I’m working on a company intranet and need to predefine the ?subject and ?body in an e-mail link. When I do, the text always defaults to lowercase. Is there

Question: I have been developing software in Foxpro 2.5 for DOS for many years. I have just bought a licensed VFP 6.0, I want to know what is new in

Question: I used InstallShield that comes with Delphi 3 to install a Delphi 3 program on another user’s computer running Windows 98. The install includes the full BDE and two

Question: How do I prevent corrupt indexes or automate the rebuilding of corrupt indexes? Answer: Prevent corrupt indexes by taking steps to prevent the crash of an application: 1. Consider

Question: I am generating Active Server Pages using Visual InterDev and VBScript. I have fetched all my records from the database through my ActiveX DLL into a collection variable. Can

Question: Is there a simple way to ascertain the names of all the controls on a particular form at run time? Answer: Every TComponent descendant has two properties, ComponentCount and

Question: I am trying to create a setup.exe for VFP 5.0, using the setup wizard. After I installed the application using the setup.exe and ran the program, I got error

Question: I have a Delphi 3 application running on a Novell network, that uses Paradox tables. For some reason, some of the users get the following message every once in

Question: I need a summary-select which summaries cumulative values. This one works in Microsoft Access: SELECT s.nl_item_id, s.nl_value, ( SELECT sum(sub.nl_value) FROM TABLE1 sub WHERE sub.nl_item_id

Question: Is there any way to fire a file deletion from inside an ASP page while the page is being unloaded? I am creating a file on the fly using

Question: How do I typecast text to LPARAM? LPARAM is supposed to be an integer, but clearly the API call wants text. I’m assuming I missed some pchar>string or pointer

Question: When the browser is pointed to a directory with no default HTML page then, in most cases, it shows the directory contents. Is it possible to create an HTML

Question: My executable takes almost a minute to run. How can I speed up the process? I am not running any queries at this point?I wait until I actually show

Question: How can I put a variable in a SQL string? For example: input:=edit1.text;query1.sql.add(‘select * from address where name like ‘); Answer: Since SQL.Add takes a string, all you need

Question: I need to create an onscreen invoice. I can figure out Supplier name, Customer name, and so on. But I can’t figure out how to do the body?for example,

Question: How do I add two label values together and submit the answer to another label? Label19.Caption := FloatToStrF(Table1Standard.AsFloat,ffCurrency,15,2)Label20.Caption := FloatToStrF(Table1Zero.AsFloat,ffCurrency,15,2)Label21.Caption := StrToFloat(????????? Answer: This is one of those things

Question: How can you convert Delphi to C++? Answer: I don’t know of any conversion tools out there that do this, though I could be wrong. If you’re using both

‘———————————————————‘ OverwriteHandler class” you can associate this class to a form, using the’ Form property, and all the textbox controls in the’ form will support insert/overwrite mode switching” Usage: Dim

You can create “polymorphic” routines that work with any type of array (except arrays of fixed-length strings, or UDTs) by using Variant parameters. Take for example the following code: Function

Many programmers don’t realize that it is perfectly legal to use the name of a function inside the Function itself, as if it were a local variable. This trick often

If you need a quick-and-dirty About dialog box for your application, that maintains a consistent look with other Windows applications, look no further than the ShellAbout routine in SHELL32.DLL. Using

At times you may want to return a Dos ErrorLevel when closing your VB application. This can be necessary, for example, if the EXE is meant to be called from