How do I add an option in a plugin?

[Valcav]

Hello,

I created a product,
I created a plugin,

in that plugin I have some php-code...

PHP Code:

if (in_array($threadinfo['forumid'], array(69))) 


& a little bit further

PHP Code:

 $dest_id = 70; 


What I want to do now,
Is having a button for my product on the left side,
and in there a button called "options" or something similar.
when you click on that, on the right side:

News Thread Forum ID:
(Enter the forum id where the News thread will be made)
&
News Discussions Thread Forum ID:
(Enter the forum id where the News Discussions thread will be made)

So what do I need to do to change that "69" so whatever number is filled in the "News Thread Forum ID" is used there...
And what do I need to change that "70" so whatever number is filled in the "News Discussions Thread Forum ID" is used there...


(You can call me lazy for not reading enough of documentations, I'm just a little bit to impatient for reading)

Friendly greetings,
and thanks in advance
Valcav