diff --git a/EGkGeomDB.h b/EGkGeomDB.h
index 15a309b..f5cccd2 100644
--- a/EGkGeomDB.h
+++ b/EGkGeomDB.h
@@ -33,17 +33,17 @@ class _declspec( novtable) IGeomDB
       virtual bool Clear( void) = 0 ;
       virtual bool Load( std::ifstream& osIn) = 0 ;
       virtual bool Save( std::ofstream& osOut) = 0 ;
-      virtual bool ExistsObj( const std::string& sName) = 0 ;
-      virtual bool AddGeoObj( const std::string& sName, IGeoObj* pGeoObj) = 0 ;
-      virtual GeoObjType GetObjType( const std::string& sName) = 0 ;
-      virtual IGeoObj* GetGeoObj( const std::string& sName) = 0 ;
-      virtual bool Copy( const std::string& sNameSou, const std::string& sNameDest) = 0 ;
-      virtual bool Erase( const std::string& sName) = 0 ;
-      virtual bool Translate( const std::string& sName, const Vector3d& vtMove) = 0 ;
-      virtual bool Rotate( const std::string& sName, const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) = 0 ;
-      virtual bool Rotate( const std::string& sName, const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) = 0 ;
-      virtual bool Scale( const std::string& sName, const Point3d& ptCen, double dCoeffX, double dCoeffY, double dCoeffZ) = 0 ;
-      virtual bool Mirror( const std::string& sName, const Point3d& ptOn, const Vector3d& vtNorm) = 0 ;
+      virtual bool ExistsObj( int nId) = 0 ;
+      virtual bool AddGeoObj( int nId, IGeoObj* pGeoObj) = 0 ;
+      virtual GeoObjType GetObjType( int nId) = 0 ;
+      virtual IGeoObj* GetGeoObj( int nId) = 0 ;
+      virtual bool Copy(int nIdSou, int nIdDest) = 0 ;
+      virtual bool Erase( int nId) = 0 ;
+      virtual bool Translate( int nId, const Vector3d& vtMove) = 0 ;
+      virtual bool Rotate( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) = 0 ;
+      virtual bool Rotate( int nId, const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) = 0 ;
+      virtual bool Scale( int nId, const Point3d& ptCen, double dCoeffX, double dCoeffY, double dCoeffZ) = 0 ;
+      virtual bool Mirror( int nId, const Point3d& ptOn, const Vector3d& vtNorm) = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------
diff --git a/EGnStringUtils.h b/EGnStringUtils.h
index 3c6b5f1..3646571 100644
--- a/EGnStringUtils.h
+++ b/EGnStringUtils.h
@@ -86,7 +86,7 @@ FromString( const std::string& sVal, double& dVal)
         pStart = sVal.c_str() ;
         dVal = strtod( pStart, &pStop) ;
         return ( pStop != pStart  &&  *pStop == '\0'  &&  errno == 0) ; }
-const std::string EGN_EXPORT ToString( int nVal, int nPrec = 1) ;
+EGN_EXPORT const std::string ToString( int nVal, int nPrec = 1) ;
 inline const std::string
 ToString( bool bVal)
       { return std::string( ( bVal ? "1" : "0")) ; }