Improve guide for Windows users (#126)

Extend section for Visual Studio Code users.

Author: Chris Wögi

guides/windows.md

@@ -1,44 +1,81 @@
-# Windows Users
+# Windows users
 
 > Exqlite uses an [Erlang NIF](https://erlang.org/doc/tutorial/nif.html) under the hood.  
-> Means calling a native implementation in C.  
-> For Windows users this means compiling Exqlite does not magically just work.  
+> Means calling a native implementation in C.
+
+For Windows users this means compiling Exqlite does not magically just work.  
+Of course, using **WSL 2** can be an alternative.
 
 ## Requirements
 
-### Install Microsoft Visual C++ Build Tools
+### Install Microsoft Visual C++ build tools
 
 Download page:  
 [visualstudio.microsoft.com/visual-cpp-build-tools](https://visualstudio.microsoft.com/visual-cpp-build-tools/)
 
 Alternative direct download link:  
 [aka.ms/vs/16/release/vs_buildtools.exe](https://aka.ms/vs/16/release/vs_buildtools.exe)  
-_for Visual Studio 2019 - version 16_
+_(aligned with Visual Studio 2019 - version 16)_
+
+You need to install the **C++ build tools** workload with the default optional components.
 
-## Building
+## Building environment
 
 ### Start command prompt with necessary environment
 
-> Assuming you want to build for Windows x64.
+> Assuming you are building for Windows x64.
 
-Within Windows Start menu search for:  
+Within Windows start menu search for:  
 x64 Native Tools Command Prompt
 
-Starting this command prompt all necessary environment variables for compiling should be ready.
+Starting this command prompt all necessary environment variables  
+for compiling should be ready within the prompt.
 
-Means ready to run:
-```cmd
+Ready to run:
+```powershell
 mix deps.compile exqlite
 
 # or
 mix compile
 mix test
+...
 ```
 
 **Alternative way to start prompt**
 
-Assuming you have _latest_ version of Build Tools (Visual Studio 2019) installed.
+> Assuming you have _latest_ version of Build Tools, aligned with Visual Studio **2019**,  
+installed in its default installation path.
 
-```
+```powershell
 cmd /k "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvars64.bat"
 ```
+
+## Visual Studio Code users using ElixirLS
+
+> Assuming you have _latest_ version of Build Tools, aligned with Visual Studio **2019**,  
+installed in its default installation path.
+
+Start Visual Studio Code from a PowerShell prompt within your project folder.
+
+```powershell
+cmd /k '"C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvars64.bat" && code .'
+```
+
+With starting Visual Studio Code this way, ElixirLS should work  
+and even your integrated terminal should be aware or the build tools.
+
+Probably make yourself a shortcut for this.
+
+**Integrated terminal only**
+
+Within your global `settings.json` or your workspace `.vscode\settings.json` add:
+
+```json
+{
+  "terminal.integrated.shell.windows": "cmd.exe",
+  "terminal.integrated.shellArgs.windows": [
+     "/k",
+     "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Auxiliary\\Build\\vcvars64.bat",
+  ]
+}
+```