diff --git a/EInAPI.h b/EInAPI.h
index 458f630..cab95b1 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -737,8 +737,9 @@ EIN_EXPORT BOOL __stdcall EgtSimGetMoveInfo( int* pnGmove, double* pdFeed) ;
 EIN_EXPORT BOOL __stdcall EgtSimSetStep( double dStep) ;
 EIN_EXPORT BOOL __stdcall EgtSimSetUiStatus( int nUiStatus) ;
 EIN_EXPORT BOOL __stdcall EgtSimStop( void) ;
-// Generation
+// Generation & T&L estimation
 EIN_EXPORT BOOL __stdcall EgtGenerate( const wchar_t* wsCncFile, const wchar_t* wsInfo) ;
+EIN_EXPORT BOOL __stdcall EgtEstimate( const wchar_t* wsEstFile, const wchar_t* wsInfo) ;
 // Machine
 EIN_EXPORT int  __stdcall EgtGetBaseId( const wchar_t* wsBase) ;
 EIN_EXPORT int  __stdcall EgtGetTableId( const wchar_t* wsTable) ;
diff --git a/EMkMachMgr.h b/EMkMachMgr.h
index 109eace..0ca8c3f 100644
--- a/EMkMachMgr.h
+++ b/EMkMachMgr.h
@@ -235,6 +235,7 @@ class __declspec( novtable) IMachMgr
       virtual bool SimStop( void) = 0 ;
      // Generation
       virtual bool Generate( const std::string& sCncFile, const std::string& sInfo) = 0 ;
+      virtual bool Estimate( const std::string& sEstFile, const std::string& sInfo) = 0 ;
      // Machine Calc
       virtual bool SetCalcTable( const std::string& sTable) = 0 ;
       virtual bool SetCalcTool( const std::string& sTool, const std::string& sHead, int nExit) = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index d504fce..a6a12f0 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -821,8 +821,9 @@ EXE_EXPORT bool ExeSimGetMoveInfo( int& nGmove, double& dFeed) ;
 EXE_EXPORT bool ExeSimSetStep( double dStep) ;
 EXE_EXPORT bool ExeSimSetUiStatus( int nUiStatus) ;
 EXE_EXPORT bool ExeSimStop( void) ;
-// Generation
+// Generation & T&L estimation
 EXE_EXPORT bool ExeGenerate( const std::string& sCncFile, const std::string& sInfo) ;
+EXE_EXPORT bool ExeEstimate( const std::string& sEstFile, const std::string& sInfo) ;
 // Machine
 EXE_EXPORT int  ExeGetBaseId( const std::string& sBase) ;
 EXE_EXPORT int  ExeGetTableId( const std::string& sTable) ;