namespace Standard { using System; using System.Runtime.InteropServices; [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode, Pack=8)] internal struct THUMBBUTTON { public const int THBN_CLICKED = 0x1800; public Standard.THB dwMask; public uint iId; public uint iBitmap; public IntPtr hIcon; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=260)] public string szTip; public Standard.THBF dwFlags; } }