diff --git a/API_GdbPartLayers.cpp b/API_GdbPartLayers.cpp
index 4ec089d..f7a21ae 100644
--- a/API_GdbPartLayers.cpp
+++ b/API_GdbPartLayers.cpp
@@ -241,6 +241,34 @@ __stdcall EgtDuploGetModified( int nSouId, BOOL* pbModif)
    return FALSE ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploSetLocked( int nDupId)
+{
+   return ( ExeDuploSetLocked( nDupId) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploResetLocked( int nDupId)
+{
+   return ( ExeDuploResetLocked( nDupId) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploGetLocked( int nDupId, BOOL* pbModif)
+{
+   if ( pbModif == nullptr)
+      return FALSE ;
+   bool bModif ;
+   if ( ExeDuploGetLocked( nDupId, bModif)) {
+      *pbModif = ( bModif ? TRUE : FALSE) ;
+      return TRUE ;
+   }
+   return FALSE ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtDuploUpdate( int nSouId)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 3916477..daddb76 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ