How to add a variable to the click handling?

Question

C++ / C#

Tell me how to pass 2 arrays to the click function

and is it real?

Answer 1

give me 2 arrays

Where to pass where they are created these arrays? If in the form, then they are already available.
If your event handler is in another object (not a form method), then the form can be reached via sender:

... (object sender, ...)
{
    var form = (Form)((ButtonExtendet)sender).Parent;
    form ... доступны все свойства и методы формы
}