MVVM - "Add New" Window

I am using MVVM / WPF in my solution.    I would like to be able to click on a "Add Address" button to open a new window and allow the user to add a new address.   Of course the address must be linked to a particular Organisation.    

This is what I have working already

1) I have a Organisation details form which has the Main Organisation Details, Addresses, Contacts.

2) I have the following. All  of which are working in isolation.  
"Organisation Details" View / ViewModel,  
"Organisation"  View / ViewModel
"Address List" View / ViewModel
"Address View" View / ViewModel.
 
3) The Organisation Details View Model contains the Organisational View Model and the Address List View Model.
I pass in a reference to the Organisation into the both of these models.  The address list uses this to get the addresses for that organisation.

4) I can currently see and edit the Organisation  and edit the existing addresses.

What I need now is to open a new window to allow the user to add a new address.  

So Questions
Q1)  How and where do I place the code to open the new window
Q2)  How and where do I pass in the current Organisation Reference to the new window so the new address gets added to the Organisation.


LVL 3
Kevin RobinsonPrivate VB.NET ContractorAsked:
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CodeCruiserCommented:
Check the following example for opening a new window

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/bced6b99-c8ce-425e-9b34-967a361cedd2

You can add a new constructor which takes the organizationid as parameter so that

var newWindow = new MyNewWindow(OrgID);
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Kevin RobinsonPrivate VB.NET ContractorAuthor Commented:
I was looking more for a MVVM example.
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MikeTooleCommented:
I used code-behind to navigate around the application - my argument being that moving from one View to another can reasonably be considered as part of the View rather than the ViewModel.
The app that the following example comes from used Pages rather than Windows, but the idea should be the same.
This code opens a new Order page for the selected item in the customer list view and passes the Customer instance to the OrderEntry view constructor.

    Private Sub OpenOrder()
        If lstCustomers.SelectedItem Is Nothing Then Exit Sub
        Mouse.OverrideCursor = Cursors.Wait
        Dim nav = NavigationService.GetNavigationService(Me)
        nav.Navigate(New OrderEntry(CType(lstCustomers.SelectedItem, Models.Customer).ID))
    End Sub

Hope this helps.
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Kevin RobinsonPrivate VB.NET ContractorAuthor Commented:
Thanks
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