diff --git a/EGkCalcPocketing.h b/EGkCalcPocketing.h
index dffa76d..f1f3334 100644
--- a/EGkCalcPocketing.h
+++ b/EGkCalcPocketing.h
@@ -29,3 +29,9 @@ EGK_EXPORT bool CalcPocketing( const ISurfFlatRegion* pSfr, double dRad, double
                                bool bSmooth, ICRVCOMPOPOVECTOR& vCrv) ;
 EGK_EXPORT bool CalcZigZagInfill( const ISurfFlatRegion* pSfr, double dStep, bool bSmooth, bool bRemoveOverlapLink,
                                   ICRVCOMPOPOVECTOR& vCrvCompoRes) ;
+
+//-----------------------------------------------------------------------------
+enum { POCKET_ZIGZAG = 0,
+       POCKET_ONEWAY = 1,
+       POCKET_SPIRALIN = 2,
+       POCKET_SPIRALOUT = 3 } ;