anchor.diff:  
   
   COMMENT
  -   : WS? ('\'' | COLON? REM ' ') (LINE_CONTINUATION | ~ ('\n' | '\r'))* -> skip
  +   : WS? ('\'' | COLON? REM ' ') (LINE_CONTINUATION | ~ ('\n' | '\r'))* -> channel(HIDDEN)
      ;
   
   
  
positive.code: grammar VisualBasic6;
  
  // module ----------------------------------
  startRule
     : module EOF
     ;
  
negative.code:    ;
  
  // complex call statements ----------------------------------
  
  explicitCallStmt
     : eCS_ProcedureCall
     | eCS_MemberProcedureCall
  