diff --git a/API_MachMgr.cpp b/API_MachMgr.cpp
index a4f8aa5..b94d83b 100644
--- a/API_MachMgr.cpp
+++ b/API_MachMgr.cpp
@@ -1912,7 +1912,7 @@ __stdcall EgtSimInit( void)
 BOOL
 __stdcall EgtSimStart( BOOL bFirst)
 {
-   return ( ExeSimStart( bFirst ? TRUE : FALSE) ? TRUE : FALSE) ;
+   return ( ExeSimStart( bFirst != FALSE) ? TRUE : FALSE) ;
 }
 
 //-----------------------------------------------------------------------------
@@ -1947,6 +1947,13 @@ __stdcall EgtSimSetUiStatus( int nUiStatus)
    return ( ExeSimSetUiStatus( nUiStatus) ? TRUE : FALSE) ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtSimEnableToolTipTrace( BOOL bEnable) 
+{
+   return ( ExeSimEnableToolTipTrace( bEnable != FALSE) ? TRUE : FALSE) ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtSimGetAxisInfoPos( int nI, wchar_t*& wsName, wchar_t*& wsToken, BOOL* pbLinear, double* pdVal)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 977ad16..c734563 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ