diff --git a/EGkGdbIterator.h b/EGkGdbIterator.h
index 14ecb08..7db25e0 100644
--- a/EGkGdbIterator.h
+++ b/EGkGdbIterator.h
@@ -37,6 +37,8 @@ class __declspec( novtable) IGdbIterator
       virtual bool GoToLastInGroup( int nIdGroup) = 0 ;
       virtual bool GoToLastInGroup( const IGdbIterator& iIter) = 0 ;
       virtual bool GoToPrev( void) = 0 ;
+      virtual bool EraseAndGoToNext( void) = 0 ;
+      virtual bool EraseAndGoToPrev( void) = 0 ;
 
       virtual int  GetGdbType( void) const = 0 ;
       virtual IGeoObj* GetGeoObj( void) = 0 ;
@@ -80,4 +82,4 @@ class __declspec( novtable) IGdbIterator
 } ;
 
 //-----------------------------------------------------------------------------
-EGK_EXPORT IGdbIterator* CreateGdbIterator( void) ;
\ No newline at end of file
+EGK_EXPORT IGdbIterator* CreateGdbIterator( IGeomDB* pGDB = nullptr) ;
\ No newline at end of file