User Interface- How to use a Checkbox to run a function

[#1]

I am attempting to build a UI that asks for the user to select "Products" from a list, and then create a graph of each product and adding "Material" to then graph title based on if the check box is selected or not.

So far I have my UI window, but I am lost on how to connect it to my graph script. I think something like an If statement may be the key, but I may be wrong.

Names Default To Here( 1 );
dt = Data Table( "untitled 16" );
values = dt:Product << Get Values;
array = Associative Array( values );
ProductList = array << Get Keys;
Final Products = {};
// Prompt for the input and create graph
FP = New Window( "Choose the Final Products",
	<<Modal,
	<<return result,
	H List Box( Spacer Box( Size( 10, 30 ) ) ),
	V List Box(
		align( center ),
		Spacer Box( Size( 10, 10 ) ),
		Panel Box( "Select the Final Products", Spacer Box( Size( 10, 10 ) ), checkObj = Check Box( ProductList ), )
	), 

	//If Check box is checked (FP), then add "Material -GPC Overlay" to the title. Otherwise, Add "-GPC Overlay" to the title.
	Button Box( "OK", 
       //script that executes upon clicking "OK"
		keep_going = 1;

		Final_Products = checkObj << get selected;

	), 

           

);

nt = N Items( Final_Products );

If( keep_going & nt > 0, 

	For( i = 1, i <= nt, i++, 

		If(
			Final_Products[i] == 1, 

//              Call function for One step

				Print( {1} ); // I tried "1" , but I'm missing something here. I am guessing I can insert the graph function here rather than print, but I was using print to check my work.

		, 

			Final_Products[i] == 2, 

//              Call function for Two step

				Print( 2 ); // I tried "2" , but I'm missing something here

 

		);

	);

);
FP << Close Window;

[#2]

Add two help prints:

1. Print Final products before first If. I would suggest "printing" it with Show(Final Products)
2. Add second print inside your for loop for Final_Products[i]  before first if inside the loop

These might give you a good idea what could be wrong