Hello!
I watched this tutorial:
http://download.microsoft.com/download/6/2/4/6247616D-A0C7-4552-B622-3F0450DE2462/09VB.wmv
from:
http://msdn.microsoft.com/vstudio/express/vb/learning/#forms

At first I'll write what I have:
I have simple access database file (mybase.mdb).
I made connection to the database and imported this file to my project.
I went to the Data Sources View and drag the 'category' table as GridView to my form.
So - I have a toolbar with buttons (add/delete/save) and this GridView. As the author of this tutorial said all changes which I do on a GridView without Saving (clicking and disc-button) will be saved in a dataSet memory (or something like that). If I will click disc-button all changes shoud go and be executed in a database file. The problem is that it doesn't work.

On the disc-button event I have:

Private Sub CategoryBindingNavigatorSaveItem_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CategoryBindingNavigatorSaveItem.Click
Me.Validate()
Me.CategoryBindingSource.EndEdit()
Me.CategoryTableAdapter.Update(Me.MyBase_dbDataSet.kategorie)
End Sub

What I'm doing wrong ? I want to have easy way to do this all things (adding/deleting records) to avoid way writing code.

Please help me - it would help if you watch this tutorial I think.