用于商业Windows应用的嵌入式数据存储？

Sorry for the dumb question as I'm a newbie. If I wanted to build a commercial Windows application (one I'll sell for $), what are my options in terms of an embedded datastore? Would I use MSDE? Is this something that I'd bundle with my app? Are there other options (both from MS as well as other vendors)? Do you have to pay a fee to the datastore vendor for each copy of their product that you include with each copy of your application that you sell?Sorry for the dumb question as I'm a newbie. If