I have multiple packages created in my installation. What I am trying to do is from the select installation type screen is when a user click on a certain type of installation, I want to select other installation types through code so if the user selects a certain type of installation all the components will be checked or unchecked accordingly.

I think I have to do this in the On Ctrl Message action but I don't really know how to get the ID of each of the controls to be able to check them through code. Thank you in advance for any help that you can give me.