diff --git a/StringUtils.cpp b/StringUtils.cpp
index 3bddceb..95e6cb9 100644
--- a/StringUtils.cpp
+++ b/StringUtils.cpp
@@ -100,6 +100,58 @@ FromString( const string& sVal, STRVECTOR& vsVal)
    return Tokenize( sVal, ",", vsVal) ;
 }
 
+//----------------------------------------------------------------------------
+const string
+ToStringAdv( int nVal, int nPrec, int nRadix, int* pnErr)
+{
+  // eseguo conversione
+   const int nBuffSize = 36 ;
+   char szBuff[nBuffSize]{} ;
+   auto Res = std::to_chars( szBuff, szBuff + nBuffSize - 1, nVal, nRadix) ;
+   if ( Res.ec != std::errc()) {
+      if ( pnErr != nullptr)
+         *pnErr = int( Res.ec) ;
+      return "#Error" ;
+   }
+   // gestione codice di errore
+   if ( pnErr != nullptr)
+      *pnErr = 0 ;
+   // verifico lunghezza minima
+   int  nLen = (int) strlen( szBuff) ;
+   if ( nLen >= nPrec)
+      return szBuff ;
+   // porto la stringa alla minima lunghezza
+   std::string sBuff( szBuff)  ;
+   sBuff.insert( 0, ( nPrec - nLen), '0') ;
+   return sBuff ;
+}
+
+//----------------------------------------------------------------------------
+const string
+ToStringAdv( unsigned int nVal, int nPrec, int nRadix, int* pnErr)
+{
+  // eseguo conversione
+   const int nBuffSize = 36 ;
+   char szBuff[nBuffSize]{} ;
+   auto Res = std::to_chars( szBuff, szBuff + nBuffSize - 1, nVal, nRadix) ;
+   if ( Res.ec != std::errc()) {
+      if ( pnErr != nullptr)
+         *pnErr = int( Res.ec) ;
+      return "#Error" ;
+   }
+   // gestione codice di errore
+   if ( pnErr != nullptr)
+      *pnErr = 0 ;
+   // verifico lunghezza minima
+   int  nLen = (int) strlen( szBuff) ;
+   if ( nLen >= nPrec)
+      return szBuff ;
+   // porto la stringa alla minima lunghezza
+   std::string sBuff( szBuff)  ;
+   sBuff.insert( 0, ( nPrec - nLen), '0') ;
+   return sBuff ;
+}
+
 //----------------------------------------------------------------------------
 const string
 ToString( double dVal, int nPrec, int* pnErr)