How do i delete about class?

[Par duck]

Hello I'm begginer.

I was searching about that, but I can't find about class (excepted?) indicator, profile, history,array and others.

and F1( MQL4 Reference)  is not understanded.

I was typing as follows.

Ticket t();      // Class name



delete &t;

but It is not working ~Ticket()  (=destructor )

How do i delete about class ? 

Thank you in advance.