WHether a view is updateable depends on many things. If you use an agreegate function in it the view is not updateable. If you have a SQL Server backend and an Accesss front end, the table must have a primary key or other unique identifier to be updateable.
Even if the view is updateable, you cannot update mutiple tables in one step, so it is stiul best to update tables through stored procedures and not to use views for this.
Lok at views-SQL Server, Modifyng data in BOL for the rules on updating and inserting to views.
Questions about posting. See faq183-874