diff --git a/EGkGdbConst.h b/EGkGdbConst.h
index 8a53360..1da2759 100644
--- a/EGkGdbConst.h
+++ b/EGkGdbConst.h
@@ -83,7 +83,8 @@ const std::string GDB_SI_LIST = "!LST" ;             // Vettore Id entit
 const std::string GDB_SI_COPY = "!COP" ;             // Id entità
 const std::string GDB_SI_MGRPONLY = "!MGO" ;         // Id entità
 const std::string GDB_SI_DRAWMODE = "!DRM" ;         // Flag
-const std::string GDB_SI_DUPSOU = "!DSOU" ;          // Id entità
-const std::string GDB_SI_DUPLIST = "!DLST" ;         // Vettore Id entità
-const std::string GDB_SI_DUPMODIF = "!DMOD" ;        // Flag
-      
\ No newline at end of file
+const std::string GDB_SI_DUPSOU = "!DSOU" ;          // Duplo Id entità originale
+const std::string GDB_SI_DUPLIST = "!DLST" ;         // Duplo Vettore Id entità duplicate
+const std::string GDB_SI_DUPMODIF = "!DMOD" ;        // Flag di sorgente per duplo modificato
+const std::string GDB_SI_DUPLOCKED = "!DLOK" ;       // Flag di duplo bloccato (da non aggiornare seguendo originale)
+const std::string GDB_SI_DUPTOUPDATE = "!DTUP" ;     // Flag di duplo da aggiornare quando sbloccato
diff --git a/EInAPI.h b/EInAPI.h
index 6937f81..c191239 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -323,6 +323,9 @@ EIN_EXPORT BOOL __stdcall EgtDuploCount( int nSouId, int* pnCount) ;
 EIN_EXPORT BOOL __stdcall EgtDuploList( int nSouId, int*& vInd, int* pnCount) ;
 EIN_EXPORT BOOL __stdcall EgtDuploSetModified( int nSouId) ;
 EIN_EXPORT BOOL __stdcall EgtDuploGetModified( int nSouId, BOOL* pbModif) ;
+EIN_EXPORT BOOL __stdcall EgtDuploSetLocked( int nDupId) ;
+EIN_EXPORT BOOL __stdcall EgtDuploResetLocked( int nDupId) ;
+EIN_EXPORT BOOL __stdcall EgtDuploGetLocked( int nDupId, BOOL* pbModif) ;
 EIN_EXPORT BOOL __stdcall EgtDuploUpdate( int nSouId) ;
 EIN_EXPORT BOOL __stdcall EgtIsDuplo( int nDupId) ;
 EIN_EXPORT int  __stdcall EgtDuploGetOriginal( int nDupId) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 1c5f9a1..5613a15 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -361,6 +361,9 @@ EXE_EXPORT bool ExeDuploCount( int nSouId, int& nCount) ;
 EXE_EXPORT bool ExeDuploList( int nSouId, INTVECTOR& vnRef) ;
 EXE_EXPORT bool ExeDuploSetModified( int nSouId) ;
 EXE_EXPORT bool ExeDuploGetModified( int nSouId, bool& bModif) ;
+EXE_EXPORT bool ExeDuploSetLocked( int nDupId) ;
+EXE_EXPORT bool ExeDuploResetLocked( int nDupId) ;
+EXE_EXPORT bool ExeDuploGetLocked( int nDupId, bool& bLocked) ;
 EXE_EXPORT bool ExeDuploUpdate( int nSouId) ;
 EXE_EXPORT bool ExeIsDuplo( int nDupId) ;
 EXE_EXPORT int  ExeDuploGetOriginal( int nDupId) ;