if (sys.gvarfind('struct_is_set') = -1)
 gvar (struct_is_set)
 gvar(BLK_IMPORT,BLK_HEAD,BLK_GLOB,BLK_CLASS,BLK_OBJ,BLK_BODY,BLK_LABELS,BLK_FUNC,BLK_NOTH,BLK_FOOTER,BLK_LOC,BLK_EVENTS)
 gvar (fn)
 BLK_HEAD =    "head"
 BLK_IMPORT =  "import"
 BLK_GLOB =    "globals"
 BLK_CLASS = "class"
// BLK_OBJ =   "objects" //Fso, Re, ...
 BLK_BODY =    "body"
// BLK_LABELS = "labels"
 BLK_EVENTS =  "events" // On...

 BLK_FUNC =    "functions"
 BLK_NOTH =    "Nothing"
 BLK_FOOTER =  "footer"
 BLK_LOC =     "locals"
 
 block.reg(BLK_HEAD)
 block.reg(BLK_IMPORT)
 block.reg(BLK_GLOB)
 block.reg(BLK_CLASS)
 block.reg(BLK_OBJ)
 block.reg(BLK_BODY)
 block.reg(BLK_EVENTS)
 block.reg(BLK_FUNC)
 block.reg(BLK_NOTH)
 block.reg(BLK_FOOTER)
 block.reg(BLK_LOC)
 block.select(BLK_FOOTER)
 println('# Created with HiAsm Studio '+code(sys.hi_version("%mj.%mn build %bl"))+ ' (http://www.hiasm.com)')
 block.select(BLK_BODY)
end