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   ► KBTo/From GuidesCorel Paradox  Print This     

File Extensions

Languages Focus

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

Corel Paradox: 

Paradox for Windows has two primary file types: source files and delivered files:

Source 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
  • .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.





Cross Reference Examples:

Access VBA:   .MDB
  • .MDB - Access Database
  • .MDE - Protected Access Database
ASP Classic:   .ASP

.asp is the default extension for Active Server Pages (ASP) although some developers will change the default extension in an effort to add an additional security level. Although there is no clear standard for include files, using .INC is common but you must make sure that .INC files are not executed nor displayed.

More Info / Comment
C#: 

Common source code file extensions include:

  • .SLN - Solution File. Contains solution specific information such as links to the projects within this solution.
  • .CSPROJ - C# Project File. Contains project specific information. When you add a file containing one or more classes, it is added to this file.
  • .CS - C# source file.
  • .Designer.CS - C# form file (a text resource file).
Syntax Example:
//Sample code snippet from the .csproj project file:
<ItemGroup>
  <Compile Include="Cyborg.cs" />
  <Compile Include="Cyborg600.cs" />
  <Compile Include="Form1.cs">
    <SubType>Form</SubType>
  </Compile>
  //...
C++:   .CPP and .H

Important standard C++ file extensions:

  • .CPP = C++ Source file. Your startup source file will have a main() routine.
  • .C = C source file (sometimes used for C++ source files too).
  • .H = Header include file.

Some important Visual C++ file extensions:

Some important C++Builder file extensions:

  • .BDSPROJ and .CBPROJ = Project file.
More Info / Comment
C++/CLI:   .CPP and .H

The C++/CLI standard file extensions are the same as standard C++. Important C++ file extensions:

  • .CPP = C++ Source file. Your startup source file will have a main() routine.
  • .C = C source file (sometimes used for C++ source files too).
  • .H = Header include file.

Some important Visual C++ file extensions:

More Info / Comment
Delphi: 

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.

Delphi Prism: 

Delphi Prism common source code file extensions include:

  • .SLN - Solution File. Contains solution specific information such as links to the projects within this solution.
  • .Oxygene - Project File. Contains project specific information but this is not the Delphi-like project file Delphi developers are used to. This is the VS.Net project file.
  • Program.pas - This is the Delphi-like .dpr project-equivalent file and contains the Main method which is the entry point for the executable. All .NET projects except for DLLs needs one.
  • .pas - Delphi Prism source file (same extension as Delphi for Win32).
  • .Designer.pas - Prism form file (a text resource file).
More Info / Comment
Java:   .java

The customary primary source file extension for Java code is ".java" which could contain anywhere from a single class to the entire source code.

Other important files:

  • .JAR - Java archive file (compressed code file). Archive that contains multiple Java files and is compressed using .ZIP compression; stores Java classes and metadata and may be digitally signed; runs as a program if the Java Runtime Environment (JRE) is installed on the computer.
  • .CLASS - compiled source code which are platform-independent. If a source file has more than one class, each class is compiled into a separate .class file. These .class files can be loaded by any Java Virtual Machine (JVM).
JavaScript: 

.js is the common standard for browser-side JavaScript and .jsp is the common standard for server-side JavaScript.

More Info / Comment
Perl:   .pl, .plex, and .aspl

.pl is the traditonal default extension for Perl although some developers will change the default extension in an effort to add an additional security level and .cgi is still popular as a Perl associated extension as well as .plex and .aspl.

  • .pl - Perl
  • .cgi - Common Gateway Interface
  • .plex - Perl Executable
  • .aspl - Active Server Perl
More Info / Comment
PHP:   .php

.php is the default extension for PHP although some developers will change the default extension in an effort to add an additional security level. If your code is tied to a particular version of PHP then some developers at the major PHP version number to the extension as in .php3, .php4, .php5, etc. 

.phtml is also sometimes used especially for files that contain both HTML and Perl code.

More Info / Comment
VB Classic: 
  • .BAS = VB source code file.
  • .CLS = VB class file (one class per file).
More Info / Comment
VB.Net: 

Common source code file extensions include:

  • .SLN - Solution File. Contains solution specific information such as links to the projects within this solution.
  • .VBPROJ - VB.Net Project File. Contains project specific information in XML. When adding a file, it is added to the project file.
  • .VB -VB.Net source file.
  • .Designer.VB -VB.Net form file (a text resource file).
Syntax Example:
//Sample code snippet from the .vbproj project file:
<ItemGroup>
  <Compile Include="Cyborg.vb" />
  <Compile Include="Form1.vb">
    <SubType>Form</SubType>
  </Compile>
  //...




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