I expalined why it doesn't work elsewhere in this thread.

>I tried simple test code as below, but it doesn't work.
>
>

aaa=CREATEOBJECT("form")
>bbb=CREATEOBJECT("daa")
>
>BINDEVENT(aaa,"unload", bbb,"handle")
>BINDEVENT(aaa,"destroy", bbb,"handle")
>
>aaa.release()
>
>DEFINE CLASS daa as Line
>
>	PROCEDURE handle()
>	
>	MESSAGEBOX("DDD")
>	
>	ENDPROC
>	
>
>ENDDEFINE
>

>
>Please advice. Thank you