How do you select more than one answer in a drop down list box?

I have a web form that has drop down list boxes.  I have to now add the functionality that the drop down list box be able to select more then one answer at a time.  How do I do that in ASP.NET?
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You use a different control like a list box.
You can't use a dropdown list box for this.  If you add a regular listbox, you can change SelectionMode property to "Multiple", then you can access the selected items in code behind like this:

Dim item as WebControls.ListItem
For Each item in ListBox1.Items
    If item.Selected Then
        Message.Text &= item.Text & "<br>"
    End If

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VBBRettAuthor Commented:
Multiple select option for list boxes.
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