[Build]Fix building on Visual Studio 17.8 (#29303)

* Add definition to ignore deprecated stdext checked_array_iterator

* Disable warning to ignore direct mention of dll in C# headers

* Fix PowerAccent Keyboard Service build errors

* Remove unused event variables

* Fix uninitialized events

* Remove unused telemetry events

* Fix building ShortcutGuide

* Fix C-style casts

* Fix spellcheck

src/modules/Hosts/HostsModuleInterface/dllmain.cpp

@@ -49,7 +49,7 @@ private:
     //contains the non localized key of the powertoy
     std::wstring app_key;
 
-    HANDLE m_hProcess;
+    HANDLE m_hProcess = nullptr;
 
     HANDLE m_hShowEvent;