add an example build instruction with windows shell code highlighting

doc/building.rst

@@ -5,10 +5,11 @@ Building the Single-File Release
 --------------------------------
 
 Using the GCC compiler, the following calls build the library on Linux.
+
 .. code-block:: bash
 
-    gcc -std=c99 -fPIC -c open62541.c
-    gcc -shared open62541.o -o libopen62541.so
+   gcc -std=c99 -fPIC -c open62541.c
+   gcc -shared open62541.o -o libopen62541.so
    
 
 Building with CMake on Ubuntu
@@ -33,6 +34,29 @@ Building with CMake on Ubuntu
    # select additional features
    ccmake ..
    make
+
+Building with CMake on Windows (Visual Studio)
+----------------------------------------------
+
+- Get and install Python 2.7.x (Python 3.x should work, too) and CMake: https://python.org/downloads, http://www.cmake.org/cmake/resources/software.html
+- Get and install Visual Studio 2015 Preview: https://www.visualstudio.com/downloads/visual-studio-2015-ctp-vs
+- Download the open62541 sources (using git or as a zipfile from github)
+- Open a command shell (cmd) with Administrator rights and run
+
+.. code-block:: bat
+
+   <path-to-python>\Scripts\pip.exe install lxml
+
+- Open a command shell (cmd) and run
+
+.. code-block:: bat
+   cd <path-to>\open62541
+   mkdir build
+   cd build
+   <path-to>\cmake.exe .. -G "Visual Studio 14 2015"
+   # Or use cmake-gui for a graphical user-interface
+
+- Then open "build\open62541.sln" in Visual Studio 2015 and build as usual
    
 Build Options
 -------------