diff --git a/API_GdbCreateSurf.cpp b/API_GdbCreateSurf.cpp
index 53e6cf3..c1c1f71 100644
--- a/API_GdbCreateSurf.cpp
+++ b/API_GdbCreateSurf.cpp
@@ -19,6 +19,18 @@
 
 using namespace std ;
 
+//-------------------------------------------------------------------------------
+int
+__stdcall EgtCreateSurfFlatRegion( int nParentId, int nNumId, const int nCrvIds[])
+{
+   INTVECTOR vCrvIds ;
+   vCrvIds.reserve( nNumId) ;
+   for ( int i = 0 ; i < nNumId ; ++i) {
+      vCrvIds.push_back( nCrvIds[i]) ;
+   }
+   return ExeCreateSurfFlatRegion( nParentId, vCrvIds, nullptr) ;
+}
+
 //-------------------------------------------------------------------------------
 int
 __stdcall EgtCreateSurfTmBBox( int nParentId, const double ptMin[3], const double ptMax[3], int nRefType)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 8b2b924..c03c492 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ