text: 
  #ifndef _ASN1NULL_H
  #define _ASN1NULL_H
  #include "ASN1Object.h"
  
  class CASN1Null : public CASN1Object {
    private:
      static const BYTE TAG;
  
    public:
      // costruttori
      CASN1Null(UUCBufferedReader& reader);
  
      CASN1Null();
  
      // distruttori
  
      ~CASN1Null();
  };
  
  #endif  // ASN1BOOLEAN