diff --git a/EGkVolZmap.h b/EGkVolZmap.h
index 1424aec..433b706 100644
--- a/EGkVolZmap.h
+++ b/EGkVolZmap.h
@@ -55,6 +55,7 @@ class __declspec( novtable) IVolZmap : public IGeoObj
       virtual bool Create( const Point3d& ptO, double dDimX, double dDimY, double dDimZ, double dPrec, bool bTriDex) = 0 ;
       virtual bool CreateFromFlatRegion( const ISurfFlatRegion& Surf, double dDimZ, double dPrec, bool bTriDex) = 0 ;
       virtual bool CreateFromTriMesh( const ISurfTriMesh& Surf, double dPrec, bool bTriDex) = 0 ;
+      virtual bool CreateEmptyMap( const Point3d& ptO, double dLengthX, double dLengthY, double dLengthZ, double dStep, bool bTriDex) = 0 ;
       virtual int  GetBlockCount( void) const = 0 ;
       virtual int  GetBlockUpdatingCounter( int nBlock) const = 0 ;
       virtual bool GetBlockTriangles( int nBlock, TRIA3DEXVECTOR& vTria) const = 0 ;
@@ -72,6 +73,11 @@ class __declspec( novtable) IVolZmap : public IGeoObj
       virtual bool SetGenTool( const std::string& sToolName, const ICurveComposite* pToolOutline, int nFlag) = 0 ;
       virtual bool SetMortiserTool( const std::string& sToolName, double dH, double dW, double dTh, double dRc, int nFlag) = 0 ;
       virtual bool SetChiselTool( const std::string& sToolName, double dH, double dW, double dTh, int nFlag) = 0 ;
+      virtual bool SetCurrTool( int nCurrTool) = 0 ;
+      virtual int GetToolCount( void) const = 0 ;
+      virtual int GetCurrTool( void) const = 0 ;
+      virtual bool AddTool( void) = 0 ;
+      virtual bool ResetAllTools( void) = 0 ;
       virtual bool ResetTool( void) = 0 ;
       virtual const ICurveComposite& GetToolOutline( bool bApprox = false) const = 0 ;
       virtual bool MillingStep( const Point3d& ptPs, const Vector3d& vtDs, const Point3d& ptPe, const Vector3d& vtDe) = 0 ;