diff --git a/API_GdbPartLayers.cpp b/API_GdbPartLayers.cpp
index 75dc357..88b4129 100644
--- a/API_GdbPartLayers.cpp
+++ b/API_GdbPartLayers.cpp
@@ -179,3 +179,69 @@ __stdcall EgtSelectPathObjs( int nId, BOOL bHaltOnFork)
 {
    return ( ExeSelectPathObjs( nId, ( bHaltOnFork != FALSE)) ? TRUE : FALSE) ;
 }
+
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtDuploNew( int nSouId)
+{
+   return ExeDuploNew( nSouId) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploCount( int nSouId, int* pnCount)
+{
+   if ( pnCount == nullptr)
+      return FALSE ;
+   return ( ExeDuploCount( nSouId, *pnCount) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploList( int nSouId, int*& vInd, int* pnCount)
+{
+   INTVECTOR vnRef ;
+   if ( ! ExeDuploList( nSouId, vnRef))
+      return FALSE ;
+   int nDim = int( vnRef.size()) ;
+   if ( nDim == 0) {
+      vInd = nullptr ;
+   }
+   else {
+      vInd = (int*) malloc( nDim * sizeof( int)) ;
+      if ( vInd == nullptr)
+         return false ;
+      for ( int i = 0 ; i < nDim ; ++ i)
+         vInd[i] = vnRef[i] ;
+   }
+   *pnCount = nDim ;
+   return TRUE ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploSetModified( int nSouId)
+{
+   return ( ExeDuploSetModified( nSouId) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtDuploUpdate( int nSouId)
+{
+   return ( ExeDuploUpdate( nSouId) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtIsDuplo( int nDupId)
+{
+   return ( ExeIsDuplo( nDupId) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtDuploGetOriginal( int nDupId)
+{
+   return ExeDuploGetOriginal( nDupId) ;
+}
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 89e026a..c18c568 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ