Hi,
I need some help in using the DataGrid.

I seem to manage to appear data located in my database,
but I want to do some specific actions, for example:

1. Some of the columns displayed cannot be changed by the user (I mean deleted, modified)
2. Some other columns I want the user to be able to modify them (change their numerical value). And not just that,in addition I want one of the columns to be then calculated (by using the other columns), displayed and also saved in the database.

3. On Form Load I want to re-calculate the 'calculated column' and also, display a total (in a label for example) at the end, (or maybe in a row)... like we do in excel...

Can anyone please help with any of those??? Is there a guide for all of this? I have a book but it refers to this only in 1-2 pages, and I can't seem to make it work... Please please help!

Thx