diff --git a/EGkVolZmap.h b/EGkVolZmap.h
index 27966e9..bcd4e29 100644
--- a/EGkVolZmap.h
+++ b/EGkVolZmap.h
@@ -88,6 +88,8 @@ class __declspec( novtable) IVolZmap : public IGeoObj
       virtual IVolZmap* ClonePart( int nPart) const = 0 ;
       virtual bool RemovePart( int nPart) = 0 ;
       virtual int  GetPartMinDistFromPoint( const Point3d& ptP) const = 0 ;
+      virtual bool AddSurfTm( const ISurfTriMesh* pStm) = 0 ;
+      virtual bool MakeUniform( double dToler) = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------
diff --git a/EXeExecutor.h b/EXeExecutor.h
index f0d14cd..53bbeb1 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -382,6 +382,8 @@ EXE_EXPORT int  ExeCreateVolZmapEmpty( int nParentId, const Point3d& ptIni, doub
                                        double dDimY, double dDimZ, double dPrec, bool bTriDex, int nRefType) ;
 EXE_EXPORT int  ExeCreateVolZmapByRegionExtrusion( int nParentId, int nSfrId, double dDimZ, double dPrec, bool bTriDex) ;
 EXE_EXPORT int  ExeCreateVolZmapFromSurfTm( int nParentId, int nStmId, double dPrec, bool bTriDex) ;
+EXE_EXPORT bool ExeUpdateVolZmapByAddingSurfTm( int nVolZmapId, int nStmId) ;
+EXE_EXPORT bool ExeUniformVolZmap( int nVolZmapId, double dToler) ;
 
 // GeomDB PartLayer
 EXE_EXPORT bool ExeIsPart( int nPartId) ;