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Multicast events using generics

Author: Allen Ever since before Delphi 1, the (then Delphi only) RAD Studio IDE has been full of home-grown multicast event class types. I usually refer to these as an “event bus.” This is from my hardware days when I designed microcontroller based security/access control equipment. A CPU has an “address bus” and a “data bus” which can have one sender and any…
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My quotes.txt file

Author: Rudy Velthuis I have often been asked about the quotes I use when writing to the newsgroups. These come from a file called quotes.txt, and are placed under my messages by my news client, XanaNews, by some kind of random process. Although, sometimes the quotes are so appropriate, that I still suspect that Colin Wilson (the author of XanaNews) has secretly put a small, hidden artificial…
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Showing Download Progress in Delphi SOAP

Author: deepak S1409 Download the code for this white paper (dlprogress.zip, 12 KB) Abstract This paper talks about how you can show a download “progress” bar (like many download utilities do) when using SOAP to transfer data. I’ve used Delphi 7 in this…
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Multiple windows in Delphi

Author: deepak S1409 From a recent thread in borland.public.delphi.nativeapi.win32: There’s a problem in the way Delphi handles multiple open forms. Delphi applications can have multiple forms, and you will notice that each form does not appear on the task bar. Delphi…
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The Delphi Eclipse...

Author: David O17638 One item in my previous post that I specifically didn’t address is the notion of using Eclipse instead of VS. Again, this is something we’d be remiss to ignore. However, the primary ding against Eclipse is its reliance on a JVM. Were it not for the fact that we are trying to support the .NET platform, this might be a reasonable path to…
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Basic Authentication in Delphi 7 SOAP

Author: Tóth Erik Back after a break. It’s been quite a while since I wrote, so I’ll cut to the chase. Question on newsgroups: How do I set username/password for Basic Authentication on SOAP. Issues: The HTTPRio.HTTPWebNode.UserName and .Password properties…
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The Observer Pattern

Author: Joanna C1415 Introduction When we use Delphi to design forms and data modules, every time we place a component on the designer, several things change: the form now shows an appropriate representation of the component, the object inspector changes to show the…
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Tables vs. Query Components - Differences between Desktop and C/S databases

Author: Adailton C38044 The reason there are both Table and Query components is due to the fact there are table-oriented databases like Dbase, Paradox, or Access, and there are set-oriented databases like Interbase, Oracle, and MSSQL. These different types of database systems work and behave differently from one another and the same methods of access cannot be equally applied. Table components…
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