You can read contacts with a Contacts object. Currently it is read-only. So adding new contacts is not possible.
Intent addContactIntent = new Intent(Contacts.Intents.Insert.ACTION, Contacts.People.CONTENT_URI);
addContactIntent.putExtra(Contacts.Intents.Insert.NAME, "Jean-Claude"); // an example, there is other data available
startActivity(addContactIntent)
Dim i As Intent
i.Initialize("android.intent.action.INSERT", "vnd.android.cursor.dir/contact_extensions")
StartActivity(i)