Add from vb.application, a new procedure to a SqlServerDataBase

I develop in vb.net and c#
I want to give the user an option to choose a dataBase in sqlServer, and to write a script in a textBox.
My program will add to the selected dataBase a new stored procedure, and will fill the procedure with the text from the textBox.
My question is: How can I add from my program a new procedure to a SqlServerDataBase?
I will be happy to get answers to my questions.