WP-CODEBOX here. Its easy to configure as there are only a few settings that you can change. These settings are pre-configured and you shouldn't require to change any, but should you want, then go ahead.

CAUTION:- Leaving any colour field blank will not remove the colour, its just that your colour won't be changed. Also, if you don't save a valid Colour HexCode, then you'll be responsible if your CSS breaks.
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Line Numbers
Show line numbers beside your code 		/> Wrap overflowing text
If you turn this option on, lines will be wrapped when they reach the width of the screen.
size="4" /> Tab width (in spaces)
Tabs in your input will be turned into this many spaces (maximum of 20) 		/> Show Plain Text Code
Enabling this option will show the "PLAIN TEXT" link with your code boxes to allow users to get your code as un-hilited Plain Text.
/> Hilite Code in Comments
Enabling this option will hilite the code posted in your comments. 		Show Plain Text Code In
Select where you want the PLAIN TEXT code to appear, in a new pop-up window or have it appear in the codebox itself with the option to show hilited code back again. This is useful only if you have enabled the PLAIN TEXT option above.
Output Styles
Aspect Colour Bold Italic Case Sensitive
Default Colour
All the text not to be highlighted
Keywords
if, while, do etc
Keywords II
null, void, true, false etc
Inbuilt Functions/Classes
Functions/classes predefined by your language: System, rand() etc
Data Types
Keywords that signal a data type: int, double, boolean etc
Comments
Comments in your language		 4
Escaped Characters
Escaped characters in your language: \n, \t, \\ etc
Brackets
Brackets: (, ), [, ], {, }
Strings
Strings: "hello!", 'hello, world!'
Numbers
Literal numbers, including decimal numbers and powers (1, -1.2e6)
Methods and Data Fields
Methods and data fields for class languages
Source Code Input via a text field:
Choose a language
Configuration Complete