diff --git a/API_BeamMgr.cpp b/API_BeamMgr.cpp
index 5092d43..51891dc 100644
--- a/API_BeamMgr.cpp
+++ b/API_BeamMgr.cpp
@@ -217,14 +217,14 @@ __stdcall EgtBeamShowSolid( int nPartId, BOOL bShow)
 
 //-----------------------------------------------------------------------------
 BOOL
-__stdcall EgtBeamGetBuildingIsOn( void)
+__stdcall EgtBeamGetBuildingIsOn( int nAssGrpId)
 {
-   return ( ExeBeamGetBuildingIsOn() ? TRUE : FALSE) ;
+   return ( ExeBeamGetBuildingIsOn( nAssGrpId) ? TRUE : FALSE) ;
 }
 
 //-----------------------------------------------------------------------------
 BOOL
-__stdcall EgtBeamShowBuilding( BOOL bShow)
+__stdcall EgtBeamShowBuilding( int nAssGrpId, BOOL bShow)
 {
-   return ( ExeBeamShowBuilding( ( bShow != FALSE)) ? TRUE : FALSE) ;
+   return ( ExeBeamShowBuilding( nAssGrpId, ( bShow != FALSE)) ? TRUE : FALSE) ;
 }
diff --git a/EgtInterface.rc b/EgtInterface.rc
index fe7d33e..1d3d23c 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ