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   ► KBProgrammingDelphi for W...Language Basics   Print This     
  From the July 2009 Issue of Prestwood eMag
 
Delphi Language Basics:
Delphi File Extensions
 
Posted 11 years ago on 12/14/2008 and updated 2/12/2009
Delphi Code Snippet:
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KB101353



Languages Focus: File Extensions

Common or primary file extensions used (not a complete list, just the basics).

Delphi File Extensions

Common source code file extensions include:

  • .BDSPROJ - Project, Borland Developer Studio project file holds compiler options, etc. This is the file you open.
  • .DCU - Delphi Compiled Unit file.
  • .DFM - Delphi Win32 form file (a text resource file).
  • .DPR - Delphi project file. Primary project "source" file.
  • .PAS - Delphi unit source file.

Note: Delphi 2009 changed the project file to acommadatte new features. When you open a project file from a previous version, it will be upgraded. In addition to .bdsproj, D2009 also uses a .dproj project file.

Classes in .PAS Source files

It is customary to group related classes into a single .pas unit file.

Delphi 1-7: Because all classes in a unit are friendly (see each other's private members), some developers like to put each class in it's own unit and reserve putting multiple classes in the same unit until they wish to implement friendly classes.

Delphi 2005+: New strict keyword allows you to indicate friendly.

Delphi Prism: The Strict keyword was introduced from the beginning (Delphi.Net�preview that shipped with D7).

More Info

Code:  Delphi Prism File Extensions

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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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