Question : Windows Forms(Beginner)

Hi

After working on web applications for 2 years, now I started working on windows forms application.After entering values into form in asp.net we process the data by clicking a button(ie in button click event handler the data is processed). But coming to windows forms, after making data entry into(textboxes) windows forms, the data is processed on making changes to textboxes even without clicking a button.
Why is it done like that? After searching, I came to know that windows applications are like desktop like applications and client side executed. I didn't understand that. Could any one please suggest me regarding this? If possible, please post some resources or sample applications regarding this.

Thank You

Answer : Windows Forms(Beginner)

I've always used a query to build the database and used the syntax...
"Field_Name TEXT(20)"

As an example, I found this random page with a google search...
http://allenbrowne.com/func-DDL.html
...that shows how to create a table with a query.