diff --git a/API_GdbModifyCurve.cpp b/API_GdbModifyCurve.cpp
index 67ec6bf..984b5f6 100644
--- a/API_GdbModifyCurve.cpp
+++ b/API_GdbModifyCurve.cpp
@@ -153,6 +153,13 @@ __stdcall EgtTrimExtendCurveByLen( int nId, double dLen, const double ptNear[3],
    return ( ExeTrimExtendCurveByLen( nId, dLen, ptNear, nRefType) ? TRUE : FALSE) ;
 }
 
+//----------------------------------------------------------------------------
+int
+__stdcall EgtTrimCurveWithRegion( int nCrvId, int nRegId, BOOL bInVsOut, BOOL bOn, int* pnCount)
+{
+   return ExeTrimCurveWithRegion( nCrvId, nRegId, ( bInVsOut != FALSE), ( bOn != FALSE), pnCount) ;
+}
+
 //----------------------------------------------------------------------------
 int
 __stdcall EgtSplitCurve( int nId, int nParts)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 7edec11..6d61844 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ