diff --git a/API_MachMgr.cpp b/API_MachMgr.cpp
index 3fe35ad..0e1fa5c 100644
--- a/API_MachMgr.cpp
+++ b/API_MachMgr.cpp
@@ -1336,6 +1336,27 @@ __stdcall EgtUpdateMachining( void)
    return ( ExeUpdateMachining() ? TRUE : FALSE) ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtPreparePreviewMachiningTool( void)
+{
+   return ( ExePreparePreviewMachiningTool() ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtRemovePreviewMachiningTool( void)
+{
+   return ( ExeRemovePreviewMachiningTool() ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtPreviewMachiningTool( int nEntId, int nFlag)
+{
+   return ExePreviewMachiningTool( nEntId, nFlag) ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtGetMachiningParamBool( int nType, BOOL* pbVal)