SystemTrayMenu/NativeDllImport/SHAppBarMessage.cs

// <copyright file="SHAppBarMessage.cs" company="PlaceholderCompany">
// Copyright (c) PlaceholderCompany. All rights reserved.
// </copyright>

namespace SystemTrayMenu.DllImports
{
    using System;
    using System.Runtime.InteropServices;

    /// <summary>
    /// wraps the methodcalls to native windows dll's.
    /// </summary>
    public static partial class NativeMethods
    {
        internal enum ABM : uint
        {
            New = 0x00000000,
            Remove = 0x00000001,
            QueryPos = 0x00000002,
            SetPos = 0x00000003,
            GetState = 0x00000004,
            GetTaskbarPos = 0x00000005,
            Activate = 0x00000006,
            GetAutoHideBar = 0x00000007,
            SetAutoHideBar = 0x00000008,
            WindowPosChanged = 0x00000009,
            SetState = 0x0000000A,
        }

        internal enum ABE : uint
        {
            Left = 0,
            Top = 1,
            Right = 2,
            Bottom = 3,
        }

        internal static IntPtr Shell32SHAppBarMessage(ABM dwMessage, [In] ref APPBARDATA pData)
        {
            return SHAppBarMessage(dwMessage, ref pData);
        }

        [DllImport("shell32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        [DefaultDllImportSearchPaths(DllImportSearchPath.UserDirectories)]
        private static extern IntPtr SHAppBarMessage(ABM dwMessage, [In] ref APPBARDATA pData);

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct APPBARDATA
        {
            public uint cbSize;
            public IntPtr hWnd;
            public uint uCallbackMessage;
            public ABE uEdge;
            public RECT rc;
            public int lParam;
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }

        internal static class ABS
        {
            public const int Autohide = 0x0000001;
            public const int AlwaysOnTop = 0x0000002;
        }
    }
}