Add code to
MouseMove
of
ComboBoxItem
or
<ComboBoxItem MouseMove="ComboBoxItem_MouseMove">Item 1</ComboBoxItem>
Private Sub ComboBoxItem_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseEventArgs)
End Sub
This is how you can get index of that item.
[Edit]
You can use this to get highlighted item on MouseMove and KeyDown of ComboBox.
Private Function GetHighlightedItem(ByVal cbox As ComboBox) As Integer
For Each item As ComboBoxItem In cbox.Items
If item.IsHighlighted Then
Return ComboBox1.Items.IndexOf(item)
End If
Next
Return -1
End Function