Extensions Incorporated in TclPro

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TclPro incorporates several widely-used Tcl extensions with its distribution. Beyond simply providing source code for the extensions, TclPro integrates the extensions in several ways to make it easier for you to use the extensions in your applications:

• Each extension is pre-compiled for all of the TclPro supported platforms. You don't need to compile them from source files. If you are writing a custom interpreter, Chapter 8, "Creating Custom Interpreters with TclPro" on page 109 describes the locations of the extension libraries and provides information about linking with them.
• The enhanced TclPro interpreters, protclsh83 and prowish83, provide built-in support for all incorporated extensions.
• TclPro Checker and TclPro Debugger understand all new commands and control structures implemented by each extension.
• TclPro Wrapper provides built-in support for creating wrapped applications that use the bundled extensions.

The following sections describe each of the extensions bundled with TclPro.

Note: Each extension traditionally provided its own custom interpreter with built-in support for that extension's commands and control structures (for example, itclsh or expect). With TclPro, support for these extensions is provided by the protclsh83 and prowish83 interpreters. To use the features of a particular extension, you must execute an appropriate package require command before using any of the commands or control structures of that extension. Table 6 lists the necessary package require command for each supported extension.

Table 6 Required Commands for Loading Supported TclPro Extensions

Extension	Required Initialization Command
Expect	package require Expect
[incr Tcl]	package require Itcl
[incr Tk]	package require Itk
[incr Widgets]	package require Iwidgets
TclX	package require Tclx
TkX	package require Tkx

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