move,attach,detach sql expres database

i am using local database in my application development,i want to create new database with same exisitng database schema
i want to add functionality such as new,export,import database

how can i create blank database files using existing database schema
aur move physcial db file from one location to another location

i am using sql server express databas (.mdf) files

how can i accomplish
please prove detail steps