Re PARADOX 3 Posts

If you have an existing Paradox system you can keep using it but you'll need to skip the Vista operating system and either stick with Windows XP or move to Windows 7. Because better tools exist, you may very well want to put a plan together now for converting to another development tool or at least understand what the future is likely to hold. If you're a power-user or researcher working with data, stick with Paradox.

An alternate solution for a Corel Paradox query that fails to yield accurate results due to a huge number of records in a data table.

This article will discuss an ObjectPAL coding technique I use to send out an email blast from a Paradox data table of email addresses via a third party email client.

A simple fix for Paradox data tables appearing totally black in data table view mode.

Initial Concerns: 

We provide app support and maintenance with our monthly App Maintenance plans.

Process:

1. If Paradox, send Paradox Support Plan flyer; otherwise, send App Maintenance flyer.
2. Follow up, ask, "How much support and/or coding per week or month do you need?"
3. If interested, determine entry level from question above, create SLA.
4. Send SLA.
5. Follow up until yes/no.

Recently, one of our message board visitors asked if was possible to connect to - and use - an existing Paradox databases with Visual Studio .NET. The answer is "Yes!"

Chapter 16, "Handling the Keyboard" from Paradox 9 Power Programming by Mike Prestwood.

Using spaces within database column names may be "legal," but that doesn't mean it won't make your life harder. It's legal in Paradox tables and most database systems but you might want to avoid using spaces. Here's why - and one way to use spaces if you're using Paradox tables under .NET.

Does Paradox X4 have any new features over X3?

Step by step instructions for setting some of Paradox's more useful preferences.

Chapter 24 "SQL and Client/Server Applications" of Paradox 9 Power Programming by Mike Prestwood.

In Paradox, you add an index for each sort your wish to perform on a table then use switchIndex(). Alternatively, you can use sortTo() to sort a table into a new table.

Although the .NET Framework is well "tuned" for MS SQL Server, it can also be pressed into service with other databases.

A somewhat unusual case is using ASP .NET to access and modify data in Paradox tables.  If you're going to do that, the most important thing to know is which ODBC driver to use - because you will be using an ODBC Driver.

The driver to use was created by Intersolv and bundled with Paradox v9. That driver has a version designation of v3.11

Language Overview: Object based language. Although ObjectPAL uses object oriented techniques "under the hood", it is not object oriented. Although you cannot create classes, ObjectPAL has built-in objects you can use in your code. You code in a traditional approach attaching code to objects or within a script. Most Paradox applications are form based. You may have a short startup script but you design forms and reports and tie them together with a common form. You can store reusable code such as custom methods and procedures in a library.

Target Platforms: Corel Paradox is most suitable for creating business desktop applications that run within Corel Paradox for Windows.

Chapter 12, "Handling Reports" from Paradox 9 Power Programming by Mike Prestwood.

Use a file server (not a workstation) to store your data, disable Oplocks on the filer server, and configure the BDE (local share to true and optimize if desired). Finally, if workstations are crashing, fix em so they don't. You want clean running computers that don't crash.

No built-in report writer but because JavaScript most frequently targets website development (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations).

Both Eclipse 3.3 and JBuilder 2008 come bundled with Business Intelligence and Reporting Tools (BIRT). BIRT is an Eclipse-based open source reporting system with both a report designer based on Eclipse, and a runtime component that you can add to your app server plus a charting engine that lets you add charts.

Paradox for Windows has two primary file types: source files and delivered files. Source files in Paradox are binary but can can be opened in later versions of Paradox and even in earlier versions if you don't use any new features: .FSL = Form, .RSL = Report, .SSL = Script, and .LSL = Library. Since Paradox source files do not compile to an EXE, Paradox developers tend to use a startup form or script to start the application.

Use any report writer you are comfortable with but Crystal Reports remains popular for Visual C++ and C++/CLI.

Use any report writer you are comfortable with. C++Builder 2009 comes bundled with Rave Reports and Crystal Reports remains popular for Visual C++.

Paradox & Overloading

• Operator - No.
• Method - No.

However, you can have the same named method or procedure so long as they are in different libraries. This is important if you use libraries in a class-like OOP way and wish to implement some form of polymorphism (i.e. libMember.Open and libVendor.Open). This is an OOP-like technique for implementing a subtyping-like polymorphism which is also known as inclusion polymorphism.

Also, some developers like to pass an array and then handle the array for a pseudo technique. Although not overloading, it's useful.

Corel Paradox for Windows (was Borland Paradox). Also, Borland used to offer a Paradox for DOS tool which support it's Paradox Application Language (PAL) which is not compatible with ObjectPAL. The biggest drawback to Paradox is that Corel does not have anyone at Corel actively developing Paradox for Windows (as opposed to Microsoft Access which does).

Languages Focus: Development Tools

Primary development tool(s) used to develop and debug code.

Microsoft includes ReportViewer Starting with Visual Studio 2005. You can even surface this .Net solution in your VB Classic application if you wish. For WebForm applications the client target is the browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations). For WinForm applications, Crystal Reports is still very popular with VB.Net developers because it has been bundled with Visual Basic since VB 3, it's overall popularity, and compatibility with many different development tools.

For WebForm applications the client target is the browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations). For WinForm applications, Crystal Reports is still a popular choice with C# developers because it has been bundled with many Microsoft products, it's overall popularity, and compatibility with many different development tools.

Because website development targets a client browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations).

Because website development targets a client browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations).

For WebForm applications the client target is the browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations). For WinForm applications Rave Reports and Crystal Reports are very popular with Delphi Prism and Delphi for .Net developers.

Because ASP Classic targets a client browser (a document interfaced GUI), a common solution is to simply output an HTML formatted page with black text and a white background (not much control but it does work for some situations).

Crystal Reports was very popular with VB Classic developers and came bundled with Visual Basic 3 through 6. VB6 offers both Crystal Reports and the new Microsoft Data Report Designer.

Paradox offers a built-in reporting tool that will suffice for most desktop database applications.

Microsoft Access offers a built-in reporting tool that will suffice for most desktop database applications.

Chapter 29 by Mike Prestwood from the book WordPerfect Office 2000 for Linux: The Official Guide. First published June 2000 by Osborne-McGraw/Hill. ISBN 0-07-212238-2.

Chapter 28 by Mike Prestwood from the book WordPerfect Office 2000 for Linux: The Official Guide. First published June 2000 by Osborne-McGraw/Hill. ISBN 0-07-212238-2.

Chapter 27 by Mike Prestwood from the book WordPerfect Office 2000 for Linux: The Official Guide. First published June 2000 by Osborne-McGraw/Hill. ISBN 0-07-212238-2.

Chapter 26 by Mike Prestwood from the book WordPerfect Office 2000 for Linux: The Official Guide. First published June 2000 by Osborne-McGraw/Hill. ISBN 0-07-212238-2.