diff --git a/EXeExecutor.h b/EXeExecutor.h
index 4c6b8ce..df713f4 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -702,6 +702,7 @@ EXE_EXPORT bool ExeSurfTmFacetNearestMidPoint( int nId, int nFacet, const Point3
 EXE_EXPORT bool ExeSurfTmFacetCenter( int nId, int nFacet, int nRefId, Point3d& ptCen, Vector3d& vtN) ;
 EXE_EXPORT bool ExeSurfTmFacetNormVersor( int nId, int nFacet, int nRefId, Vector3d& vtNorm) ;
 EXE_EXPORT bool ExeSurfTmFacetMinAreaRectangle( int nId, int nFacet, int nRefId, Frame3d& frRect, double& dDimX, double& dDimY) ;
+EXE_EXPORT bool ExeSurfTmFacetElevationInBBox( int nId, int nFacet, const BBox3d& b3Box, int nRefId, double& dElev) ;
 EXE_EXPORT bool ExeSurfTmFacetOppositeSide( int nId, int nFacet, const Vector3d& vtDir, int nRefId,
                                             Point3d& ptP1, Point3d& ptP2) ;
 EXE_EXPORT bool ExeSurfTmFacetOppositeSideEx( int nId, int nFacet, const Vector3d& vtDir, int nRefId,