    [StructLayout(LayoutKind.Sequential)]
    struct LPNMTBCUSTOMDRAW
    {
        public NMCUSTOMDRAW nmcd;
        public IntPtr hbrMonoDither;
        public IntPtr hbrLines;
        public IntPtr hpenLines;
        public int clrText;
        public int clrMark;
        public int clrTextHighlight;
        public int clrBtnFace;
        public int clrBtnHighlight;
        public int clrHighlightHotTrack;
        public RECT rcText;
        public int nStringBkMode;
        public int nHLStringBkMode;
    }

        public LPNMTBCUSTOMDRAW Empty
        {
            get
            {
                LPNMTBCUSTOMDRAW customdrawinfo = new LPNMTBCUSTOMDRAW();

VB Definition:

    <StructLayout(LayoutKind.Sequential)> _
    Structure LPNMTBCUSTOMDRAW
        Public nmcd As NMCUSTOMDRAW
        Public hbrMonoDither As IntPtr
        Public hbrLines As IntPtr
        Public hpenLines As IntPtr
        Public clrText As Integer
        Public clrMark As Integer
        Public clrTextHighlight As Integer
        Public clrBtnFace As Integer
        Public clrBtnHighlight As Integer
        Public clrHighlightHotTrack As Integer
        Public rcText As RECT
        Public nStringBkMode As Integer
        Public nHLStringBkMode As Integer
    End Structure
                customdrawinfo.nmcd = NMCUSTOMDRAW.Empty;
                customdrawinfo.hbrMonoDither = IntPtr.Zero;
                customdrawinfo.hbrLines = IntPtr.Zero;
                customdrawinfo.hpenLines = IntPtr.Zero;
                customdrawinfo.clrText = 0;
                customdrawinfo.clrMark = 0;
                customdrawinfo.clrTextHighlight = 0;
                customdrawinfo.clrBtnFace = 0;
                customdrawinfo.clrBtnHighlight = 0;
                customdrawinfo.clrHighlightHotTrack = 0;
                customdrawinfo.rcText = RECT.Empty;
                customdrawinfo.nStringBkMode = 0;
                customdrawinfo.nHLStringBkMode = 0;

                return customdrawinfo;
            }
        }
    }