Distribution of Application with SQL Server DB

If I create a Window's application that uses a MS Sql Server DB created with the express edition, do I need to get permission or submit royalties for distribution of my application? If so, where can I find the required info? I have been Googling without success and want to understand what is involved.

My projects are mostly for fun and my own amazement at this point, but I thinking about creating something that may actually become a product and need some guidance before I get much further along with it.

You may freely distribute SQL Server Express Edition.

See this link to register and for more details.

SQL Server 2005 Express Redistribution
http://www.microsoft.com/sql/editions/express/redistregister.mspx

The following may help you customize your own installer for SQL Server.

SQL Server 2005 UnAttended Installations
http://msdn2.microsoft.com/en-us/library/ms144259.aspx
http://msdn2.microsoft.com/en-us/library/bb264562.aspx
http://www.devx.com/dbzone/Article/31648

|||Thanks Arnie. Very encouraging info.