diff --git a/EInAPI.h b/EInAPI.h
index b25d6b9..48e0477 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -327,7 +327,7 @@ EIN_EXPORT BOOL __stdcall EgtAtParamVector( int nId, double dU, int nSide, int n
 EIN_EXPORT BOOL __stdcall EgtFrame( int nId, int nRefId, double ptOrig[3],
                                     double vtX[3], double vtY[3], double vtZ[3]) ;
 EIN_EXPORT BOOL __stdcall EgtCurveLength( int nId, double* pdLen) ;
-EIN_EXPORT BOOL __stdcall EgtCurveLengthAtPoint( int nId, double ptOn[3], double* pdLen) ;
+EIN_EXPORT BOOL __stdcall EgtCurveLengthAtPoint( int nId, double ptOn[3], double dExtend, double* pdLen) ;
 EIN_EXPORT BOOL __stdcall EgtCurveExtrusion( int nId, int nRefId, double vtExtr[3]) ;
 EIN_EXPORT BOOL __stdcall EgtCurveThickness( int nId, double* pdThick) ;
 EIN_EXPORT BOOL __stdcall EgtGetMinDistPointCurve( const double ptP[3], int nId, double* pdDist) ;
diff --git a/EMkDllMain.h b/EMkDllMain.h
new file mode 100644
index 0000000..2bc0c49
--- /dev/null
+++ b/EMkDllMain.h
@@ -0,0 +1,34 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2015-2015
+//----------------------------------------------------------------------------
+// File : EMkDllMain.h          Data : 22.03.15          Versione : 1.6c6
+// Contenuto : Prototipi funzioni generali della DLL. 
+//
+//
+//
+// Modifiche : 22.03.15 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include <string>
+
+class ILogger ;
+
+//----------------------- Macro per import/export ----------------------------
+#undef EMK_EXPORT
+#if defined( I_AM_EMK)            // da definirsi solo nella DLL
+   #define EMK_EXPORT __declspec( dllexport)
+#else
+   #define EMK_EXPORT __declspec( dllimport)
+#endif
+
+//-----------------------------------------------------------------------------
+// restituisce la versione della Dll (stringa del tipo 1.4a5)
+EMK_EXPORT const char* GetEMkVersion( void) ;
+// permette di impostare il logger per la Dll
+EMK_EXPORT void SetEMkLogger( ILogger* pLogger) ;
+// imposta la chiave di protezione
+EMK_EXPORT void SetEMkKey( const std::string& sKey) ;