Notepad++ Portable 6.4.1 - new User Defined Language system (UDL2). UDL (User Defined Language) is one of most important features in Notepad++. In v6.2, much better UDL system (UDL2). Not only many restrictions/limitations in UDL are removed, but also a lot of new features/enhancements are added in UDL2. In fact, you can almost define any language with it.

It's the handy Notepad++ text editor packaged as a portable app so you can do your development on the go. It has all the same great features of Notepad++ including support for multiple languages and an extensive plugin system, but there's nothing to install.

It also gives the extra functionality to the general user: colorize the user defined words. You can print your source code in color (or whatever you want) if you have a color printer (WYSIWYG). Furthermore, Notepad++ includes the multi-view feature, which allows the user to edit the different documents at the same time, and even edit the same document synchronously in 2 different views.

Notepad++ supports drag and drop: not only you can drop the file from explorer to open it, but also you can drag and drop a document from a view to another. With all the functionalities, Notepad++ runs as fast as Notepad provided by MS Windows.

Features
* Syntax Highlighting and Syntax Folding (C, C++, HTML, ASP, Java, Pascal, CSS and more)
* User Defined Syntax Highlighting
* Auto-completion
* Multi-Document
* Regular Expression Search/Replace supported
* Full Drag ‘N? Drop supported
* Zoom in and zoom out
* Multi-Language environment supported
* Brace and Indent guideline Highlighting
* Macro recording and playback

The key features of UDL2
UDL (User Defined Language) is one of most important features in Notepad++.
In v6.2, much better UDL system (UDL2) is provided by Ivan Radic (aka Loreia). Not only many restrictions/limitations in UDL are removed, but also a lot of new features/enhancements are added in UDL2. In fact, you can almost define any language with it.
1. More keyword groups were added (more syntax highlighting can be defined):
- 3 folding groups
- 8 keyword groups
- 2 comment groups
- 1 number definitons
- 2 operators groups
- 8 delimiter sets
2. Multipart keywords are supported (for example: "else if" can be defined as a single keyword)
3. Whitespace is no longer mandatory as keyword separator: Operators, Delimiters and Folding keywords can be recognized with or without whitespace separators.
4. Numbers recognition support is greatly improved (prefix, suffix, range and extra symbols supported).
5. Operators and delimiters can be longer than one character.
6. The same characters can be used as comments AND operators.
7. Comments and delimiters support nesting (even within each other).
8. Improvments to Comments include:
- Comment folding
- Comment continuation
- Comment only start at the beginning of line
9. In the case of several comment pairs defined, comment open symbols match only with comment close symbols of the same order. (for example: /* C comment */, /+ D comment +/, but not /* mixed comment +/)

Included plugins (Unicode): Compare, Convertor, Explorer, Light Explorer, Spell Checker, NppFTP , NppExport, Plugin Manager

Supported programming languages
ASP, Ada, ASCII art, Assembler, AutoIt, BAT, C, C#, C++, Caml, CSS, doxygen, FORTRAN, HTML, Haskell, Java, javascript, KiXtart, Lisp, Lua, makefile, Matlab, Objective-C, Pascal, Perl, PHP, PostScript, Python, Ruby, Scheme, Unix Shell Script, Smalltalk, SQL, Tcl, TeX, Verilog, VHDL, VB/VBScript, XML.

Jun 30, 2013. Notepad++ v6.4.1 bug fix:
* Fix a crash issue (a regression in v6.4).
Jun 29, 2013. Notepad++ v6.4 new features and bug fixes:
* Add Function List Panel (customizable, support C++ and Javascript for the moment).
* Display the error/result in the new added statusbar of Find/Replace dialog instead in popup dialogs.
* Add delimiter select by ctrl+Double click feature.
* Add set begin position feature for selection.
* Fix fold all command bug (which folds partially).
* Fix opening the same file twice due to its different path (for example symbol link).
* Fix deleting macro from macro menu crash issue.
* Fix the bug of Window position not saved/restored properly.
* Fix small window size problem due to closing Notepad++ in icon state (reduced in the taskbar) on the last session.
* Enhance Block comment: remove 1024 bytes limit.
* Fix a detection error of UTF16 file from a binary file.
* Enhance the performance of switching files if folding is applied.
* Fix macro problem: Find functionality doesn't work in "Run a Macro Multiple Times".
* Enhance the performance while double clicking on a very long word.
* Enhance TAB/Space conversion: UTF8 support and preserving the current state.
* Change the Preferences dialog's UI (List interface instead of tab interface).