To short numbers in descending order, you can use the following codes, if you like.

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim x(9) As Integer
For i As Integer = 0 To x.GetUpperBound(0)
x(i) = i + 1
Next
Dim y As Integer = 0
For k As Integer = 0 To (x.GetUpperBound(0) - 1)
For l As Integer = 0 To (x.GetUpperBound(0) - 1)
If x(l) < x(l + 1) Then
y = x(l)
x(l) = x(l + 1)
x(l + 1) = y
End If
Next
Next
For i As Integer = 0 To x.GetUpperBound(0)
ListBox1.Items.Add(x(i))
Next
End Sub

Jim is true. You can use Order By clause with DESC in your Select statement.

Further more, if you do not use this, you can try the above codes, if you like.
For that you can first pick up the numbers from your data table in an array.

Hello!
My question is how to code search in combobox each time typeing a letter. And the search result in DropDown have to show list items which contains letter or ...