Automatic choose product

Hi,
I have a site with a product overview. You can choose between 5 products.

In the order form the products have checkboxes. I want to check the chosen product if you click on it in the overview so it will link you to the order form.

How can I achieve that?

Hi Rob,
thank you for your fast reply.

I found this article before, but I just want to "activate" one of the products if a special link is clicked. Is this the correct function for that?

Hi Carl,

I solved it on my own :o)

I have some forms with checkbox fields. They represent products. When I click on a product I want to go to the form and have the product checked.

Here is my solution, I know that it is easy, but to be at this point can be hard :o)

At my checkbox field I activated the values and insert some. Then I activated the dynamic population.

Now I can go to my URL like this:
http://www.domain.com/product/?value=1
or
http://www.domain.com/product/?shipping=free

I hope this can help some else who doens't find the solution on his own.