Content changes every Monday @ 1AM!! Check back once per week. Learn! Review! Test Yourself!
Tip of the Week Tip:
Before adding many new entries to a TStringList, set its Sorted property to false. Add all your entries. Finally, set the Sorted property back to True (if desired).
Sorting is expensive, in terms of macnine cycles. By leaving the Sorted property set to True, you force the TStingList to re-sort itself after each entry. This can significantly slow things down.
This applies to TStrings, as well, and all components that have a TStrings property, like TListBox, etc.
It's not easy because the .NET RTL resides in a different process. You can wrap up the DotNet DLL into an ActiveX control and call it or have both your app and the DotNet DLL write to the registry, a file, etc. By the way, you CAN wrap up a Win32 DLL in a DotNet DLL and call it from DotNet.
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.
procedure TUtils.Delay(MillisecondsDelay: Integer); var FirstTickCount: LongInt; begin FirstTickCount := GetTickCount; repeat Application.ProcessMessages; until ((GetTickCount-FirstTickCount) >= Longint(MillisecondsDelay)); end;
Definition of the Week Strict Visibility:
The Strict specifier tightens up the scope for private and protected. With Strict Private, members within a class are visible ONLY within the class declared and Strict Protected are visible only within the class declared and descendent classes. Without strict, private and protected members can also be seen by all classes declared in the same unit (friendly classes). The Strict specifier was introduced with Delphi for .Net preview in Delphi 7 in an update to the .Net compiler preview and with Win32 in Delphi 2005 to fully comply with the .NET CLS. Delphi's traditional private specifier maps to the CLR's assembly visibility and the protected specifier maps to the CLR's assembly or family visibility.
Link of the Week Dr. Bob 42
A popular, and charming, website containing the latest news, press releases, articles, book reviews, tools, third-party tool reviews, and news on conferences & training using Delphi for Win32, Delphi for .NET, Delphi for PHP, Kylix (Delphi for Linux), C++Builder (Delphi for C++) & C#Builder as well as ASP.NET, XML, SOAP and Web Services.
File of the Week
None This Week
Lastest Delphi Flashcard
Our flashcards are part of our library of tidbits.
Tidbits are FAQs, Definitions, Tips, and Code Snippets from our knowledge base.
By William Pantoja. For developers to communicate among the applications they develop, Microsoft has provided an evolutionary path from DDE, OLE, OLE2, to COM (DCOM allows you to communicate between applications on different or distributed machines).
This Power Point presentation presents coupling, cohesion, and scope from an OO Delphi point of view. This presentation was given at the 1998 August Sacramento Delphi User Group meeting.
Delphi Gazette Archive
The Delphi Gazette was our monthly newsletter prior to the Prestwood eMag.
Delphi Gazette - August 1998 - Volume 1, Issue 8 The August issue contains A New Look At Exceptions by Robert Muir, Using JPEGs in resource files by Larry J. Rutledge, Windows file association, Writing out Delphi source code to HTML, and more!
Delphi Gazette - July 1998 - Volume 1, Issue 7 The July issue was skipped because Larry J. Rutledge, our editor, broke his collar bone.
Delphi Gazette - June 1998 - Volume 1, Issue 6 The June issue covers Callback Procedures Using Delphi 3.0 by Dan Anaya, our Delphi Apprentice column covers several topics, and in our Components 101 column Larry J. Rutledge covers how to Auto-Repeat TSpeedButtons. Much more included!
Delphi Gazette - May 1998 - Volume 1, Issue 5 The May issue covers Incremental Lookups in our Delphi Apprentice column, and TFileInfo in our Components 101 column.
Delphi Gazette - April 1998 - Volume 1, Issue 4 Last Month, Mike Prestwood demonstrated how to design an object in Delphi by creating a TSysTime object. This month we'll extend it, adding needed funtionality to take an example class and make it more useful. Also in this issue is how to determine the cursor position in a TMemo or TRichEdit control, how to serve up a tray icon, and how to create control panel applets.
Delphi Gazette - March 1998 - Volume 1, Issue 3 This issue covers creating classes for the novice, touches on entity business objects, and answers some reader questions.
Delphi Gazette - February 1998 - Volume 1, Issue 2 This issue covers the Informant CD, GExperts (Programming Power for Delphi), and using Microsoft's IntelliMouse with Delphi.
Delphi Gazette - January 1998 - Volume 1, Issue 1 In our premiere issue Mike Prestwood covers using string grids, using GetHeapStatus, beating shareware expiration dates, and Data Flow Diagrams DFD as applied to a non computer process (Store Bought vs. Diaper Service - Which is Better?).
www.prestwood.com is part of the Prestwood Family of Websites.
Development by Mike Prestwood (ASP, ASP.Net, and Delphi to MS-SQL 2008).
Member Features powered by ASPSuite (programming by Mike Prestwood).
All rights reserved.
Delphi
MESSAGEBOARD Q&A
KNOWLEDGEBASE
Prestwood Community
Cross Ref Browser
Prestwood Certified
Member Blogs
Printable Version