Crystal reports question Please help

Question

Hi, I need to build a crystal report from an ADO.NET dataset. Each row could contain sub items. If there is any sub items i need to show them as checkbox option in the report. For example, Show list of questions. And for each questions get a set of preassigned answer and show them below the questions as checkbox options. How do i do create checkbox in Crystal reports. How do i programmatically display them according to the number of sub items. Can anyone please help me out. I would greatly appreciate. I am using C# to do the coding. Thanks a lot, Ganesh