Displaying Multidimensional Arrays in a Form

I have what should be a simple problem, but I'm not able to figure it out.

Suppose I have a 5 by 10 array. I populate the array, and now want to display this on a form.

The array is populated in a separate codefile, which passes the array to the main form file.

When I click on a button, I want to be able to see each row of the array i.e if the array is:

1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 etc etc...

Clicking the button once should give me

1 2 3 4 5 6 7 8 9 10

Clicking again should give me
11 ... 20

and so on.

How do I make this happen? I have a label named "labDisp" and a button "btnShow" on the form.

Thank you.