When ever a form is resized, the Form_Resize event fires. Place code to resize the Listview in that event.

The following example will keep the Listview control the size of the Form.

VB Code:
  1. Private Sub Form_Resize()
  2.     'don't resize anything if the form is minimized
  3.     If Me.WindowState <> vbMinimized Then
  4.         Me.ListView1.Move 0,0,ScaleWidth,ScaleHeight
  5.     End If
  6. End Sub