diff --git a/KeyGenerator.cpp b/KeyGenerator.cpp
index 91b6af3..5ab87c1 100644
--- a/KeyGenerator.cpp
+++ b/KeyGenerator.cpp
@@ -56,9 +56,9 @@ CKeyGeneratorApp::InitInstance( void)
 {
   // CommonControls initialize
    INITCOMMONCONTROLSEX InitCtrls ;
-   InitCtrls.dwSize = sizeof(InitCtrls) ;
+   InitCtrls.dwSize = sizeof( InitCtrls) ;
    InitCtrls.dwICC = ICC_WIN95_CLASSES ;
-   InitCommonControlsEx(&InitCtrls) ;
+   InitCommonControlsEx( &InitCtrls) ;
 
    CWinApp::InitInstance() ;
 
@@ -85,8 +85,10 @@ CKeyGeneratorApp::InitInstance( void)
   // verifico la protezione
    SetLockType( KEY_LOCK_TYPE_HW) ;
    string sKey = GetPrivateProfileStringUtf8( "General", "Key", "", m_pszProfileName) ;
-   if ( VerifyKey( sKey, 823, 16, 10) != KEY_OK)
+   if ( VerifyKey( sKey, 823, 16, 10) != KEY_OK) {
+      m_nExitCode = 1 ;
       return FALSE ;
+   }
 
   // gestione linea di comando
    int nFlag = 0 ;
@@ -102,9 +104,18 @@ CKeyGeneratorApp::InitInstance( void)
    dlg.DoModal() ;
 
   // Per uscire dall'applicazione
+   m_nExitCode = 0 ;
    return FALSE ;
 }
 
+//----------------------------------------------------------------------------
+int
+CKeyGeneratorApp::ExitInstance( void)
+{
+   CWinApp::ExitInstance() ;
+   return m_nExitCode ;
+}
+
 //----------------------------------------------------------------------------
 string
 GetExeNameVer( void)
diff --git a/KeyGenerator.h b/KeyGenerator.h
index 3602c9d..95c5739 100644
--- a/KeyGenerator.h
+++ b/KeyGenerator.h
@@ -27,9 +27,13 @@ class CKeyGeneratorApp : public CWinApp
       CKeyGeneratorApp( void) ;
 
    public :
-      virtual BOOL InitInstance( void) ;
+      BOOL InitInstance( void) override ;
+      int  ExitInstance( void) override ;
 
    DECLARE_MESSAGE_MAP()
+
+   private :
+      int m_nExitCode ;
 } ;
 
 //----------------------------------------------------------------------------
diff --git a/KeyGenerator.rc b/KeyGenerator.rc
index 80da151..df972df 100644
Binary files a/KeyGenerator.rc and b/KeyGenerator.rc differ