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Prestwood IT Newsletter Feb 2012 Issue - Paradox Edition

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Each month on or after the 1st, and only once a month, we will send you content from up to 5 community groups. If you select this Paradox group, you'll receive the following content below mixed in with the other groups you elect to include.

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  February 2012 - Paradox Edition (1699 of 4,788 subscribers receive this group's content.) Year 14 Issue 2  
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From The Editor

Prestwood IT Wins Best of Citrus Heights 2011

Prestwood IT received two Best of Citrus Heights 2011 plaques at the annual Best Of luncheon. Prestwood IT won for best company in both Web Design and Computer Services categories. The event was sold out with over 150 attending.



Expert guidance from working professionals!




 Paradox Group Top 
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Paradox for DOS topic (classic post):
Aggregators and their Scope: A Paradox for DOS Perspective
by Mike Prestwood
Discussion of aggregators in Paradox for Windows reports as they relate to Paradox for DOS.

OPAL: Language Basics topic (classic post):
An ObjectPAL Primer: Part 1
by Mike Prestwood

This detailed ObjectPAL primer will get you up and running developing in Paradox/ObjectPAL within a few hours.


 Monthly Paradox Lesson
OPAL: Language Basics Topic:
Code Snippet of the Month

In ObjectPAL, you use Cursor.InsertRecord to add a new record, Cursor.postRecord to post the record, and Cursor.deleteRecord() to delete it. To edit a record, you must put the cursor into edit mode, Cursor.Edit(). (A cursor applies to both a TCursor and UIObject.)

ObjectPAL gives you tremendous flexibility with editing data and includes many additional commands such as insertAfterRecord and isEdit. For dBASE tables, you can also use unDeleteRecord() to un-delete a record. See the ObjectPAL help for more commands.

The following code snippet adds a record to a given TCursor with FullName and Created fields:

tc.edit()
tc.InsertRecord()
tc.FullName = "Barack Obama"
tc.Created  = today()
tc.postRecord
Interactive Paradox: Getting Going Topic:
Definition of the Month: Data Model
A data model is a diagram of the tables used in a form or report. It identifies the tables, defines the relationships between them (links), and has features including the ability to filter each table and mark any table as read-only. You can save a data model (.dm) and reuse it with another form or report.

A data model is a diagram of the tables used in a form or report. It identifies the tables, defines the relationships between them (links), and has features including the ability to filter each table and mark any table as read-only. You can save a data model (.dm) and reuse it with another form or report.

Paradox & ObjectPAL Topic:
Download of the Month: FreeWheel by Jim Barry
A cuddly tray icon which makes all your apps work with the IntelliMouse scrolling wheel. Two modes of operation are supported. Also, FreeWheel allows you to switch between documents by holding down the control and shift keys while moving the mouse wheel. FreeWheel is free, so dont delay - try it today. You might like it! Requires Microsoft IntelliMouse or equivalent.
Paradox & ObjectPAL Topic:
Resource Link of the Month: Corel News Groups

Corel products including newsgroups for the following: Paradox, ObjectPAL, Paradox and the Web, and Paradox FAQ. Also check out the following non-Corel newsgroups: comp.databases.Paradox. TheDBCommunity.com offers a newsgroup listing page.

Tool Basics Topic:
Question:

I wanted to check out if there was a 64 bit Paradox for Windows. I believe this database tool is excellent especially in defining a database.


Answer:

No 64-bit version of Paradox for Windows. Just the current 32-bit version and the older 16-bit version. However, 64-bit versions of Windows can run 32-bit programs very well. If you're running Vista 64-bit, you may wish to stick with Paradox 9 but Vista isn't a good OS for older programs. Interestingly enough, Paradox 9, 10, and 11 run fairly well on Windows 7 which means you can keep using your Paradox applications long into the future (just skip Vista).

OPAL: Language Basics Topic:
Tip of the Month

Paradox allows developers to set what commands they can see with the object browser. You can set this to either Beginner or Advanced. Whether your ObjectPAL level is set to Beginner or Advanced, you can use all the ObjectPAL methods, procedures, properties, constants, keywords, and so on. The level panel is a help filter used just for learning purposes. However, because you could in effect "hide" code from yourself, I recommend setting this to Advanced (never use beginner).



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