Create README.md

README.md

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+# The Objective-C-Plus-Plus UDL
+[![Version](https://img.shields.io/badge/version-2023--6--16-brightgreen)](https://github.com/skadomsky/Objective-C-Plus-Plus/)<br />
+User Defined Languages (UDL) is a feature of [Notepad++ editor](https://notepad-plus-plus.org/), allowing user to define syntax 
+highlights / folding rules of any programming languages. This UDL highlights some fundamental classes in Cocoa, keywords in C++/
+Objective-C, and escape characters in Objective-C++ programming languages.
+<br />
+<br />Please refer to [Notepad++ Offical UDL Collection Repository](https://github.com/notepad-plus-plus/userDefinedLanguages) 
+for more infomation of UDLs. You can also find this UDL is avaliable [in this repository](https://github.com/notepad-plus-plus/userDefinedLanguages/blob/master/UDLs/Objective-C%2B%2B_byLattHsiang.xml).
+
+## Usage
+0. Download the raw file. <br/>
+1. Launch Notepad++, click 'Language' on toolbar, then go to 'User Defined Language', and select 'Define your language...'. <br />
+2. Click 'Import...', select the UDL in the popped up window. <br />
+3. You can specify your highlights / folding rule in User-Defined window. When all your works done, click 'x' button on the upper right of the window. <br />
+4. Push 'Language' button again, you will find 'Objective-C++' option on the down side of 'User Defined Language' menu. Choose it, Notepad++ will apply these highlights
+/ folding rules immediately.
+
+## Enhancement