This language feature is available in Xbase++, Foxpro, Clipper, Harbour and also C++, VB etc.
Erel may add it in future, like we have now,
#Region Activity Attributes
#FullScreen: False
#IncludeTitle: True
#End Region
So
#Include: "file_name.bh", say
Just a guess.
Regards,
Anand