diff --git a/EGkDllMain.h b/EGkDllMain.h
index 75d321a..aa225df 100644
--- a/EGkDllMain.h
+++ b/EGkDllMain.h
@@ -47,4 +47,4 @@ EGK_EXPORT const std::string& GetNfeFontDir( void) ;
 // restituisce il nome del font di default
 EGK_EXPORT const std::string& GetDefaultFont( void) ;
 // imposto il gestore eventi
-EGK_EXPORT bool SetEGkProcessEvents( pfProcEvents pFun) ;
\ No newline at end of file
+EGK_EXPORT bool SetEGkProcessEvents( pfProcEvents pFun) ;
diff --git a/EGnDllMain.h b/EGnDllMain.h
index 1e98e3c..72b9619 100644
--- a/EGnDllMain.h
+++ b/EGnDllMain.h
@@ -28,3 +28,9 @@ class ILogger ;
 EGN_EXPORT const char* GetEGnVersion( void) ;
 // permette di impostare il logger per la Dll
 EGN_EXPORT void SetEGnLogger( ILogger* pLogger) ;
+// imposta la chiave di protezione
+EGN_EXPORT void SetEGnKey( const std::string& sKey) ;
+// imposta il tipo di chiave di protezione
+EGN_EXPORT void SetEGnKeyType( int nType) ;
+// imposta se chiave hardware di rete
+EGN_EXPORT void SetEGnNetHwKey( bool bNetHwKey) ;
diff --git a/EGnGetKeyData.h b/EGnGetKeyData.h
new file mode 100644
index 0000000..66c9b73
--- /dev/null
+++ b/EGnGetKeyData.h
@@ -0,0 +1,33 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2023-2023
+//----------------------------------------------------------------------------
+// File : EGnGetKeyData.h        Data : 29.05.23          Versione : 2.5e3
+// Contenuto : Prototipo funzioni gestione dati chiavi di protezione.
+//
+//
+//
+// Modifiche : 29.05.23 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#define NOMINMAX
+#include <windows.h>
+#include <string>
+
+
+//----------------------- Macro per import/export ----------------------------
+#undef EGN_EXPORT
+#if defined( I_AM_EGN)            // da definirsi solo nella DLL
+   #define EGN_EXPORT __declspec( dllexport)
+#else
+   #define EGN_EXPORT __declspec( dllimport)
+#endif
+
+//-----------------------------------------------------------------------------
+EGN_EXPORT bool SetEGnKeyLevel( int nRet, int nKeyLev, int nKeyExpDays) ;
+EGN_EXPORT int  GetEGnKeyLevel( int nProd, int nVer, int nLev, int& nKeyLev, int& nKeyExpDays) ;
+EGN_EXPORT bool SetEGnKeyOptions( int nRet, int nKeyOpt1, int nKeyOpt2, int nKeyOptExpDays) ;
+EGN_EXPORT int  GetEGnKeyOptions( int nProd, int nVer, int nLev, unsigned int& nKeyOpt1, unsigned int& nKeyOpt2, int& nKeyOptExpDays) ;
diff --git a/SELkKeyProc.h b/SELkKeyProc.h
index 325be83..8a74a06 100644
--- a/SELkKeyProc.h
+++ b/SELkKeyProc.h
@@ -28,6 +28,7 @@ int GetKeyLevel( const std::string& sKey, int nProd, int nVer, int nLev,
 int GetKeyOptions( const std::string& sKey, int nProd, int nVer, int nLev,
                    unsigned int& nKOpt1, unsigned int& nKOpt2, int& nKOptExpDays) ;
 int GetCurrDay( void) ;
+int GetMinDay( void) ;
 
 //-------------------------- Constants ----------------------------------------
 // Codici di ritorno