Refer to the NOTIFYICONDATA Source Code section.

    public struct NOTIFYICONDATA

            NOTIFYICONDATA notdata = new NOTIFYICONDATA();

static extern uint Shell_NotifyIcon(uint message, ref NOTIFYICONDATA data);

Refer to the NOTIFYICONDATA Sample Code section.

struct NOTIFYICONDATA {

public class NOTIFYICONDATA

    public int cbSize = Marshal.SizeOf(typeof(NOTIFYICONDATA));

NOTIFYICONDATA nid = new NOTIFYICONDATA();

    <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> Structure NOTIFYICONDATA