HelpHelp turning on/off a Offset

Hello, im new to VB.NET and i wanted to know how i can turn on/off a offset with a button.

So i got the UAV offsets of a cod game for turning it always on and off, so if you press the button ON it should turn UAV on and off should turn it off.

I downloaded & added the ReadWritingMemory.vb for basic game hacking and wrote into the button1
(censoring offset because i worked hard for finding these offsets.)
but it shows a error. same in turning it off, do i miss some code?

please help, im learning to hack.