how to hook an instance to another class for update ?

[VAROME]

i created before a CPP code for LGL menu to hook update method from another class using an instance to that class , like
class 1
update 0x012345
instance 0x01
class 2
get_Ammo 0x01234
someFunctoin 0x0 /// this is accessed by instance 0x01 from class 1 , this is the link

i go to dnspy and choose analyze the class , and see if it is used by another class , and if that class has a method that updates like update or any other .
and create a link between them both , and then normally hook it
i will modify this when i find my old code . give me a few mintues

[VAROME]

nothing ?