diff --git a/API_GdbModifySurf.cpp b/API_GdbModifySurf.cpp
index 73f8b9d..255f289 100644
--- a/API_GdbModifySurf.cpp
+++ b/API_GdbModifySurf.cpp
@@ -70,6 +70,13 @@ __stdcall EgtExtractSurfFrChunkLoops( int nId, int nChunk, int nDestGrpId, int*
    return ExeExtractSurfFrChunkLoops( nId, nChunk, nDestGrpId, pnCount) ;
 }
 
+//----------------------------------------------------------------------------
+int
+__stdcall EgtGetSurfTmSilhouette( int nId, const double vtDir[3], int nDestGrpId, int nRefType, int* pnCount)
+{
+   return ExeGetSurfTmSilhouette( nId, vtDir, nDestGrpId, nRefType, pnCount) ;
+}
+
 //----------------------------------------------------------------------------
 int
 __stdcall EgtExtractSurfTmFacetLoops( int nId, int nFacet, int nDestGrpId, int* pnCount)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 8b9fc0f..a0f6034 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ