diff --git a/API_GeoSnap.cpp b/API_GeoSnap.cpp
index 345656f..96e36d2 100644
--- a/API_GeoSnap.cpp
+++ b/API_GeoSnap.cpp
@@ -376,6 +376,13 @@ __stdcall EgtSurfFrChunkCount( int nId)
    return ExeSurfFrChunkCount( nId) ;
 }
 
+//----------------------------------------------------------------------------
+int
+__stdcall EgtSurfFrChunkSimpleClassify( int nId1, int nChunk1, int nId2, int nChunk2)
+{
+   return ExeSurfFrChunkSimpleClassify( nId1, nChunk1, nId2, nChunk2) ;
+}
+
 //----------------------------------------------------------------------------
 int
 __stdcall EgtSurfTmFacetCount( int nId)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 8d53e0a..0832b58 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ