private static extern bool cdtInit([In] ref int width, [In] ref int height);

            bool ret = Card.cdtInit(ref _standardWidth, ref _standardHeight);

  <DllImport("cards.dll")> Private Shared Function cdtInit(ByRef width As Integer, ByRef height As Integer) As Boolean

        Dim ret As Boolean = Card.cdtInit(_standardWidth, _standardHeight)

        private static extern bool cdtInit([In] ref int width, [In] ref int height);

            bool ret = Card.cdtInit(ref _standardWidth, ref _standardHeight);

    Private Declare Function cdtInit Lib "cards.dll" (ByRef width As Integer, ByRef height As Integer) As Boolean

        Dim ret As Boolean = Card.cdtInit(_standardWidth, _standardHeight)

static extern bool cdtInit([In] ref int width, [In] ref int height);

Declare Function cdtInit Lib "cards.dll" (<[In]> ByRef Width As Integer, _