struct RASDIALPARAMS {

Structure RASDIALPARAMS

   [In, Out] ref RASDIALPARAMS lprasdialparams,

    <[In](), Out()> ByRef lprasdialparams As RASDIALPARAMS, _

RASDIALPARAMS

        IntPtr lprasdialparams,

    public RASDIALPARAMS GetDialParams() {

    var lpRasDialParams = new RASDIALPARAMS

    IntPtr pnt = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(RASDIALPARAMS)));

    Marshal.StructureToPtr(lpRasDialParams, pnt, true);

    lpRasDialParams = (RASDIALPARAMS)Marshal.PtrToStructure(pnt, typeof(RASDIALPARAMS));

    return lpRasDialParams;