Add ToDo with reminder of other things that need fixing

C#/AutoHotInterception/AutoHotInterception.csproj

@@ -46,6 +46,9 @@
     <Compile Include="Manager.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="ToDo.md" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>if not exist "$(TargetDir)x86" mkdir "$(TargetDir)x86"

C#/AutoHotInterception/ToDo.md

@@ -0,0 +1,15 @@
+# Fix issues with Numlock/Pause 
+BlueChipps in AHI Discord has a proposed fix [here](https://github.com/bluechipps/AutoHotInterception/tree/pause_numlock_support)
+
+# Poor coding of extended keys
+Currently, there is an `.ignore` flag on `KeyboardState`
+When an extended code comes in (eg extended Shift or Ctrl), then the key may be ignored and `block` could never be set 
+so the extended modifier will always be passed through.  
+Implement better system:  
+* When an extended modifier is seen, add it to a buffer  
+* When the next key comes in, check if it is subscribed and blocked
+* If it is, then purge the buffer
+* If it is not, play back the buffered extended key code and then play back the unblocked key
+
+Del is a good example:
+If Del (Above arrow keys, not on Numpad) is pressed while NumLock is off, it sends an Extended LCtrl, then the Pause Key