diff --git a/DllMain.h b/DllMain.h
index a694cb1..e635221 100644
--- a/DllMain.h
+++ b/DllMain.h
@@ -15,6 +15,8 @@
 
 
 #include "/EgtDev/Include/EgtILogger.h"
+#include <string>
 
 //-----------------------------------------------------------------------------
 ILogger* GetEGkLogger( void) ;
+const std::string& GetEGkKey( void) ;
diff --git a/EGkDllMain.cpp b/EGkDllMain.cpp
index a8934be..764ec7b 100644
--- a/EGkDllMain.cpp
+++ b/EGkDllMain.cpp
@@ -91,6 +91,23 @@ GetEGkLogger( void)
    return s_pLogger ;
 }
 
+//-----------------------------------------------------------------------------
+static std::string s_sKey ;
+
+//-----------------------------------------------------------------------------
+void
+SetEGkKey( const std::string& sKey)
+{
+   s_sKey = sKey ;
+}
+
+//-----------------------------------------------------------------------------
+const std::string&
+GetEGkKey( void)
+{
+   return s_sKey ;
+}
+
 //-----------------------------------------------------------------------------
 void
 InitFontManager( const std::string& sNfeFontDir, const std::string& sDefaultFont)
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 4fb9aa1..e183462 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/GeomDB.cpp b/GeomDB.cpp
index a449c75..fe3b6a8 100644
--- a/GeomDB.cpp
+++ b/GeomDB.cpp
@@ -23,6 +23,7 @@
 #include "/EgtDev/Include/EGkStringUtils3d.h"
 #include "/EgtDev/Include/EgnStringConverter.h"
 #include "/EgtDev/Include/EgtPointerOwner.h"
+#include "/EgtDev/Include/SELkKeyProc.h"
 #include <new>
 
 using namespace std ;
@@ -31,6 +32,14 @@ using namespace std ;
 IGeomDB*
 CreateGeomDB( void)
 {
+  // verifico la chiave
+   int nRet = VerifyKey( GetEGkKey(), 1231, 15, 1) ;
+   if ( nRet != KEY_OK) {
+      string sErr = "Error on Key (" + ToString( nRet) + ")" ;
+      LOG_ERROR( GetEGkLogger(), sErr.c_str()) ;
+      return nullptr ;
+   }
+  // creo il GeomDB 
    return static_cast<IGeomDB*> ( new(nothrow) GeomDB) ;
 }
 
diff --git a/stdafx.h b/stdafx.h
index 8712f37..829862a 100644
--- a/stdafx.h
+++ b/stdafx.h
@@ -31,3 +31,4 @@
 #pragma comment(lib, EGTEXTDIR "zlib/lib/zlib" EGTLIBVER ".lib")
 #pragma comment(lib, EGTLIBDIR "EgtGeneral" EGTLIBVER ".lib")
 #pragma comment(lib, EGTLIBDIR "EgtNumKernel" EGTLIBVER ".lib")
+#pragma comment(lib, EGTLIBDIR "SEgtLock" EGTLIBVER ".lib")