fix: Update Getting Started docs (#815)

extensions/win32/README.md

@@ -8,6 +8,26 @@ Imports the Win32 spell checking dictionary for [Code Spell Checker](https://mar
 
 This extension will automatically include [Code Spell Checker](https://marketplace.visualstudio.com/items?itemName=streetsidesoftware.code-spell-checker) extension.
 
+## Getting Started
+
+By default the `win32` dictionary is enabled for `C` and `C++` file types. To enable it for other file types, it is necessary to add it to the `dictionaries` section of the configuration or include it as an inline CSpell directive: `cspell:dictionaries win32`.
+
+Example: `example.md`
+
+````markdown
+Sample Code:
+
+```cpp
+    // Parse the command line parameters
+    int argc;
+    LPWSTR* argv = CommandLineToArgvW(GetCommandLineW(), &argc);
+    pSample->ParseCommandLineArgs(argv, argc);
+    LocalFree(argv);
+```
+
+<!--- cspell:dictionaries win32 --->
+````
+
 <!--- @@inject: ../../static/footer.md --->
 
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