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Combining Info from Two List Boxes

Hello,

I'm very very new to Visual Basics. I'm using 2005 express and I'm stuck on the list boxes. In my project I have two list boxes which have completely different sets of data in them. The data is numeric. Here is what I need to do:

1. I need to create an error message so if someone has info in one box but not the other box they will get an error message saying there must be info in box boxes. I would prefer to make it so the user has to have the same number of items in each box

2. When a button is clicked I need the info in both boxes to generate the sum and divide the answer by two

3. Lastly I would like to know how to make it so that if someone wants to change a number in a listbox they can and the new number will go in the same spot as the number they changed.

I know this is a lot but hopefully someone can help me.

Thanks

akilah Wednesday, November 15, 2006 9:31 PM

some guidelines:

Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown

If e.KeyCode = Keys.Enter Then

Me.ListBox1.Items.Add(Me.TextBox1.Text)

Dim T As Integer = 0

For Each s As Integer In Me.ListBox1.Items

T += s

MsgBox(T / 2)

End If