Database Updations through dataset in vb.net

[nfor_onlyme]

Hi,
I m a very beginner to vb.net so can anybody plz tell me How to work through Dataset to updat,delete modify select or insert values to a database through dataset.Not through wizard but through coding.
Plz help me.
Thanks
Namita

[nfor_onlyme]

I did this :
But its not working.

db = New SqlDataAdapter("select * from student", myConnection)
db.Fill(Dset, "student")
If Dset.HasChanges Then

cmd = New SqlCommandBuilder(db)
db.TableMappings.Add("Table", "Student")
Dset.AcceptChanges()

db.Update(Dset, "Student")
Dset.GetChanges()
' Dset.AcceptChanges()
db.Fill(Dset, "student")
db.AcceptChangesDuringUpdate = True