diff --git a/API_GdbModifyCurve.cpp b/API_GdbModifyCurve.cpp
index f4d9633..7679c6c 100644
--- a/API_GdbModifyCurve.cpp
+++ b/API_GdbModifyCurve.cpp
@@ -232,30 +232,30 @@ __stdcall EgtCloseCurveCompo( int nId)
 
 //-------------------------------------------------------------------------------
 BOOL
-__stdcall EgtAddCurveCompoCurve( int nId, int nAddCrvId, BOOL bEraseOrig)
+__stdcall EgtAddCurveCompoCurve( int nId, int nAddCrvId, BOOL bEraseOrig, BOOL bStartVsEnd)
 {
-   return ( ExeAddCurveCompoCurve( nId, nAddCrvId, ( bEraseOrig != FALSE)) ? TRUE : FALSE) ;
+   return ( ExeAddCurveCompoCurve( nId, nAddCrvId, ( bEraseOrig != FALSE), ( bStartVsEnd != FALSE)) ? TRUE : FALSE) ;
 }
 
 //-------------------------------------------------------------------------------
 BOOL
-__stdcall EgtAddCurveCompoLine( int nId, const double ptP[3], int nRefType)
+__stdcall EgtAddCurveCompoLine( int nId, const double ptP[3], BOOL bStartVsEnd, int nRefType)
 {
-   return ( ExeAddCurveCompoLine( nId, ptP, nRefType) ? TRUE : FALSE) ;
+   return ( ExeAddCurveCompoLine( nId, ptP, ( bStartVsEnd != FALSE), nRefType) ? TRUE : FALSE) ;
 }
 
 //-------------------------------------------------------------------------------
 BOOL
-__stdcall EgtAddCurveCompoArcTg( int nId, const double ptP[3], int nRefType)
+__stdcall EgtAddCurveCompoArcTg( int nId, const double ptP[3], BOOL bStartVsEnd, int nRefType)
 {
-   return ( ExeAddCurveCompoArcTg( nId, ptP, nRefType) ? TRUE : FALSE) ;
+   return ( ExeAddCurveCompoArcTg( nId, ptP, ( bStartVsEnd != FALSE), nRefType) ? TRUE : FALSE) ;
 }
 
 //-------------------------------------------------------------------------------
 BOOL
-__stdcall EgtAddCurveCompoArc2P( int nId, const double ptMid[3], const double ptP[3], int nRefType)
+__stdcall EgtAddCurveCompoArc2P( int nId, const double ptMid[3], const double ptP[3], BOOL bStartVsEnd, int nRefType)
 {
-   return ( ExeAddCurveCompoArc2P( nId, ptMid, ptP, nRefType) ? TRUE : FALSE) ;
+   return ( ExeAddCurveCompoArc2P( nId, ptMid, ptP, ( bStartVsEnd != FALSE), nRefType) ? TRUE : FALSE) ;
 }
 
 //-------------------------------------------------------------------------------
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 67227d6..e2a84e1 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ