Rispondo da solo

codice:
Private Declare Function ShowScrollBar Lib "user32" (ByVal hwnd As _
Long, ByVal wBar As Long, ByVal bShow As Long) As Long

Private Const SB_HORZ = 0
Private Const SB_VERT = 1
Private Const SB_BOTH = 3

    ShowScrollBar ListView1.hwnd, SB_VERT, False