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Mike Prestwood
Prestwood Software

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Tuesday, September 02, 2008

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Nice addition Mark, thanks.

Regarding...
Application.ProcessMessages

I always found the sleep command in ObjectPAL very useful. The following code does about the same thing in Delphi. It makes use of GetTickCount which is a Win32 API call that retrieves the number of milliseconds that have elapsed since the system was started, up to 49.7 days.

Mark Bestland

Rank: Cadet 2nd Year

Joined: Sep 2008
MB Posts: 1
KB Articles: 0
Location: FL USA

Monday, September 01, 2008 (Updated 9/1/2008 9:52:00 AM)

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I would avoid having to re-cast the long-int in each iteration, and I would bullet-proof the tickmax value against a negative delay parameter.

The ProcessMessages call assures the sytem responds to other processes during the iteration.

procedure tutils.delay(const millisecondsdelay: integer);
var tickmax: longint;
begin
   tickmax:=max(0,GetTickCount+millsecondsdelay);
   repeat
      Application.ProcessMessages
   until GetTickCount>=tickmax;
end;

Regarding...
Application.ProcessMessages

I always found the sleep command in ObjectPAL very useful. The following code does about the same thing in Delphi. It makes use of GetTickCount which is a Win32 API call that retrieves the number of milliseconds that have elapsed since the system was started, up to 49.7 days.

Zahid
Freelancer

Rank: Cadet 3rd Year

Joined: Aug 2008
MB Articles: 0
KB Articles: 0
Location: Dhaka BD

Sunday, August 31, 2008

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Cool!!!

Regarding...
Member Points Program

Member points information.

kroy

Rank: Cadet 2nd Year

Joined: Aug 2008
MB Articles: 0
KB Articles: 0

Tuesday, August 26, 2008

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I have an windows application using a grid control. I have set up user settings for each column of the grid to enable the user to determine various properties of those columns. For example whether a particular user wants this column Visible or not.

Everything works fine for this. But I have had many companies request ing the ability to deliver a standard set of user settings (meaning, they want all users to have the same columns properties). Application Settings will not work as each company may want to have different columns properties, so they need to be able to modify these settings. And other companies/users want the ability to have each user determine what column properties they want.

So what would be nice is to tell them to set up one workstation with the column properties they want. Then enable them to copy those user settings to different users. Can this be done?

Regarding...
Storing your .NET Application Settings

Storing settings and configuration information for your .NET application can be achieved in a number of ways including using the app.config file and the ConfigurationManager class, using the registry, and in your own custom configuration file.

Steve Green
Diamond Software Group, Inc.

Rank: Cadet 4th Year

Joined: May 2008
MB Posts: 23
KB Articles: 0
Location: Myrtle Beach, SC USA

Tuesday, August 19, 2008

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you must delete the toolbar files.. see details on Bertil's web site..

http://hem.bredband.net/bertilisberg/paradox/errdocs2/eid230.htm

Regarding...
Install Paradox 9 on Vista

Instructions to install Paradox 9 for Windows on Vista.

j.malcolmson
APR

Rank: Cadet 3rd Year

Joined: Mar 2004
MB Articles: 0
KB Articles: 0
Location: Burnaby, BC CA

Tuesday, August 19, 2008

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Has anyone gotten the following dialogue when opening Paradox 9 in Vista?

"An attempt was made to access an unmanned file past its end."

After clicking Ok, the program starts and runs in a fairly stable manner. When I tried installing higher versions of Paradox in Vista (like the one from the X3 package), the same message comes up and blocks the program from running at all.

John Malcolmson, Burnaby, BC

Regarding...
Install Paradox 9 on Vista

Instructions to install Paradox 9 for Windows on Vista.

Mike Prestwood
Prestwood Software

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Monday, August 04, 2008

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Refer to the section titled "Defeat Vista's Application Virtualization" in the Paradox 9 on Vista article. That should help.

http://www.prestwood.com/ASPSuite/kb/document_view.asp?qid=101098

Regarding...
Corel Paradox for Windows on Vista

Does Corel Paradox for Windows run on Vista? If so, are there any issues?

grantr

Rank: Cadet 3rd Year

Joined: Apr 2003
MB Articles: 0
KB Articles: 0
Location: CA

Friday, August 01, 2008

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Installed Pdox 7/32 on VHP yesterday.. Ran into errors, and just blanket changed permissions on directories to get running.. Today installing Ultimate32 and will try domain connection and idapi.. hopin it works.. works on every OS to date :)

Grant

Regarding...
Corel Paradox for Windows on Vista

Does Corel Paradox for Windows run on Vista? If so, are there any issues?

Martin Evans
Arenig Ltd

Rank: Cadet 3rd Year

Joined: Jul 2008
MB Posts: 1
KB Articles: 0
Location: Betws Gwerfil Goch UK

Monday, July 21, 2008

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Hi, I've just downloaded your trial version of psSendMail to run with Paradox 9. It appears to work fine and be just what I need - EXCEPT. When I run it on a Vista machine and send HTML emails, it just seems to send plain text. Yes, I do have the HTML flag set to True - works great with XP.

Your help appreciated.

Regards

Martin Evans

Regarding...
psSendMail DLL

Easily send e-mail directly from your custom applications. Works with all 32-bit Windows development environments and includes Paradox, Access, and Visual Basic examples.

Mike Prestwood
Prestwood Software

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Joined: Oct 2000
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KB Articles: 885
Location: Citrus Heights, CA USA

Monday, July 14, 2008 (Updated 7/14/2008 6:23:57 PM)

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I was also asked recently, why we no longer develop websites for 800x600 resolution. The reason is quite simply that according to w3schools.com, as of January 2008 86% of the web surfers are using a resolution of 1024x768 or higher.

http://www.w3schools.com/browsers/browsers_display.asp

Regarding...
Testing Websites with Various Browsers

What browsers and resolutions should I test my website with?

Mike Prestwood
Prestwood Software

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Monday, July 14, 2008 (Updated 7/14/2008 5:59:56 PM)

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I was asked recently why we removed Netscape from our standard list of browsers we design pages for. The reason is that Netscape is no longer supported by Netscape. Refer to the following page for more information:

http://browser.netscape.com/

Regarding...
Testing Websites with Various Browsers

What browsers and resolutions should I test my website with?

Mike Prestwood
Prestwood Software

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Joined: Oct 2000
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Location: Citrus Heights, CA USA

Monday, July 14, 2008 (Updated 7/14/2008 6:00:10 PM)

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I was asked recently why we removed Netscape from our standard list of browsers we test against. The reason is that Netscape is no longer supported by Netscape. Refer to the following page for more information:

http://browser.netscape.com/

Regarding...
Test Using Common Browsers

Test each website with various common browsers. As of early 2008, we test each website we build with Internet Explorer, FireFox, and Safari. Sometimes we also include Opera as part of our standard test suite. The minimum resolution we test for "regular" websites is 1024x768 (and higher). We no longer support 800x600.

Mike Prestwood
Prestwood Software

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KB Articles: 885
Location: Citrus Heights, CA USA

Sunday, July 06, 2008

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Today I cleaned up this articles code (re-pasted from my P9 book).

Regarding...
Paradox and the Internet

Using Paradox internet features. Content from chapter 25 of my "Paradox Power Programming: The Official Guide" book.

Mike Prestwood
Prestwood Software

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Wednesday, July 02, 2008 (Updated 7/2/2008 11:13:22 AM)

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Hi Graham,

>>...customer in a Customer table and orders would be in an Orders table?

Yes customers in customer table and orders in the orders table as usual.

>>...how many orders have been placed by a specific Customer belong in the Customer library (class) or in an Orders library?

Since Number of Orders is a property of a customer, I would put that property in the Customer class but you are correct that that custom method would indeed count the values from the orders table. It uses the orders.db table. Although classes frequently map 1 to 1 to tables in a database, when creating reusable code, you need to switch your thinking. You need to switch from a data-centric view to an object-centric view.

>>Or would you have a method in Customer.lib which called a method in Orders.lib?

If I wanted the ability to retrieve the number of orders of a customer in the Orders class, sure, you could design it that way. And yes, you could use aggregation where the Customer class "has a" orders object in it. In ObjectPAL, you would have to simply make use of an Orders.lib custom method.

Aggregation vs. Composition

Regarding...
Introduction to OO for the Paradox Community

Compromise OO implementation strategies for Paradox developers.

Graham Farquhar

Rank: Cadet 3rd Year

Joined: Jun 2005
MB Articles: 0
KB Articles: 0
Location: Newark UK

Wednesday, July 02, 2008

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Interesting article.

I feel the example based on interrogating the 'Customer' table to find out how many orders have been placed somewhat dubious in terms of database design - surely you would only have one record per customer in a Customer table and orders would be in an Orders table?

As far as OO design goes would a method to find out how many orders have been placed by a specific Customer belong in the Customer library (class) or in an Orders library? Or would you have a method in Customer.lib which called a method in Orders.lib?

Regarding...
Introduction to OO for the Paradox Community

Compromise OO implementation strategies for Paradox developers.

Mamacita

Rank: Cadet 3rd Year

Joined: Feb 2001
MB Posts: 1
KB Articles: 0
Location: Milpitas, CA USA

Tuesday, July 01, 2008

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Well Played.

mOM

Regarding...
Install Paradox 9 on Vista

Instructions to install Paradox 9 for Windows on Vista.

Mike Prestwood
Prestwood Software

PS Staff

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Joined: Oct 2000
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KB Articles: 885
Location: Citrus Heights, CA USA

Tuesday, July 01, 2008

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Also of note...

In Delphi for .Net, there is no difference between virtual and dynamic.

Regarding...
Virual; Abstract; vs. Dynamic; Abstract;

Why do I have to specify virtual when creating an abstract method? Why not just abstract?

Mike Prestwood
Prestwood Software

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Tuesday, July 01, 2008 (Updated 7/1/2008 5:34:05 PM)

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Here is the syntax in question:

function Age: Integer; Abstract; //Does not work.

The above returns the following error:

[Pascal Error] poc_ClassTestsUnit1.pas(23): E2167 Abstract methods must be virtual or dynamic

Here is the correct syntax:

function Age: Integer; Virtual; Abstract; //Optimized for speed and most common.

function Age: Integer; Dynamic; Abstract; //Optimized for size.

For example, here is a complete simple class example:

  TMyClass = class(TObject)
  private
    function Name: String;
  public
    function Age: Integer; Abstract;
  end;

Then in a descendent class, you implement it:

//Class declaration...

TMyClass2 = class(TMyClass)

public

  function Age: Integer;

end;

//Method implementation...

function TMyClass2.Age: Integer;
begin
  Age := 12;
end;

Regarding...
Virual; Abstract; vs. Dynamic; Abstract;

Why do I have to specify virtual when creating an abstract method? Why not just abstract?

Mike Prestwood
Prestwood Software

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Wednesday, June 25, 2008 (Updated 6/25/2008 7:28:57 PM)

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For more information on the history of Pascal Casing:

History of Pascal Casing by Brad Abrams

Regarding...
Camel versus Pascal Casing

What is the difference between Camel Casing and Pascal Casing?

Mike Prestwood
Prestwood Software

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Tuesday, June 24, 2008

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Once you've tried the above suggestions at some point you have to give up and request free support from MS. The link below will get you to the starting point:

http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3069333&SiteID=17

It does collect information from your specific computer that will help MS help you.

Regarding...
Vista SP1 Is Here, Finally!

Of course SP1 fixes some bugs, but more interesting are it's new features!

Mike Prestwood
Prestwood Software

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Joined: Oct 2000
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Location: Citrus Heights, CA USA

Tuesday, June 24, 2008

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General tips from MS:

http://support.microsoft.com/kb/947366

Regarding...
Vista SP1 Is Here, Finally!

Of course SP1 fixes some bugs, but more interesting are it's new features!

Mike Prestwood
Prestwood Software

PS Staff

Moderator

Rank: Fleet Admiral

Joined: Oct 2000
Visits: 21456
MB Posts: 981
KB Articles: 885
Location: Citrus Heights, CA USA

Tuesday, June 24, 2008

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Tip: Check your hard disk for errors

http://windowshelp.microsoft.com/Windows/en-US/Help/bc1393cf-9f9c-79c7-0f91-9337c2c41f811033.mspx

Regarding...
Vista SP1 Is Here, Finally!

Of course SP1 fixes some bugs, but more interesting are it's new features!

Mike Prestwood
Prestwood Software

PS Staff

Moderator

Rank: Fleet Admiral

Joined: Oct 2000
Visits: 21456
MB Posts: 981
KB Articles: 885
Location: Citrus Heights, CA USA

Monday, June 23, 2008

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Tip: Before applying SP1, make sure all current updates have successfully installed. If you have any failed updates, resolve that PRIOR to attempting to apply SP1.

Regarding...
Vista SP1 Is Here, Finally!

Of course SP1 fixes some bugs, but more interesting are it's new features!

Mike Prestwood
Prestwood Software

PS Staff

Moderator

Rank: Fleet Admiral

Joined: Oct 2000
Visits: 21456
MB Posts: 981
KB Articles: 885
Location: Citrus Heights, CA USA

Monday, June 23, 2008

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Tip: Before applying SP1, make sure you have registered your copy of Vista with Microsoft.

Regarding...
Vista SP1 Is Here, Finally!

Of course SP1 fixes some bugs, but more interesting are it's new features!

Wes Peterson
Prestwood Software

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Rank: Commander

Joined: Jan 2004
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KB Articles: 104
Location: Citrus Heights, CA USA

Friday, June 20, 2008

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Great tip about a grammatical detail often confused! I like the "he/him" example; makes it easier to remember.

Additional tip: When dealing with plural "hims," like "people," it's become acceptable to replace the who/whom confusion with a simple "that." Ex:

People that like Delphi are geniuses.

Regarding...
who versus whom

"him" is for "whom" and "he" is for "who" Who is coding that requirement? (He is coding it.) To whom do we ask about this requirement? (We ask him.)

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