remove, check list

How can i check a listbox for an item through a command in a txtbox? Also how can i remove the item from the listbox?

VB Code:

If (ListBox1.Items.Contains(TextBox3.Text)) Then
            ListBox1.Items.Remove(TextBox3.Text)
        Else
            MessageBox.Show(TextBox3.Text & " is not in the ListBox")
End If

Ok thanks