Help with Custom Lexer Integration in Actipro SyntaxEditor

Hi, I'm pretty new to Actipro, and I'm currently evaluating SyntaxEditor as part of a feasibility test before my team considers subscribing.

Right now, I'm trying to achieve basic syntax highlighting (changing word colors) without using the Language Designer, since I need a high level of customization later on. I believe it's important to fully understand and control the creation of a custom lexer and language definition.

I've gone through the Sample Browser, but I found it a bit hard to follow. So I'm using ChatGPT to help me build a minimal working sample. Unfortunately, I’m stuck on this part of the code — it’s not working as expected:

 public class FaizLangLexer : MergableLexerBase
 {
     public ILexicalState InitialState => null;

     public  IToken ScanToken(ITextSnapshotReader reader, IMergableToken state)
     {
         string a = reader.PeekText(2);
         if (reader.IsAtSnapshotLineStart && reader.PeekText(2) == "//")
         {
             
             reader.ReadCharacterThrough('\n');
             return new TextSnapshotToken(FaizLangClassificationTypes.Comment, reader.TokenText);
         }

         reader.ReadCharacter(); // default: read single character
         return null;
     }
 }

If possible, could you provide a complete but minimal working sample of a custom lexer that supports syntax highlighting, just as a reference? That would help me a lot.

Thank you very much!

Best regards,