117 lines
3.0 KiB
C#
117 lines
3.0 KiB
C#
using System;
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using System.Drawing;
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using System.Runtime.InteropServices;
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namespace Katteker.AppStub
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{
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public enum TaskbarPosition
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{
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Unknown = -1,
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Left,
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Top,
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Right,
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Bottom
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}
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public sealed class Taskbar
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{
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private const string ClassName = "Shell_TrayWnd";
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public Taskbar()
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{
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var taskbarHandle = User32.FindWindow(ClassName, null);
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var data = new APPBARDATA
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{
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cbSize = (uint) Marshal.SizeOf(typeof(APPBARDATA)),
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hWnd = taskbarHandle
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};
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var result = Shell32.SHAppBarMessage(ABM.GetTaskbarPos, ref data);
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if (result == IntPtr.Zero)
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throw new InvalidOperationException();
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Position = (TaskbarPosition) data.uEdge;
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Bounds = Rectangle.FromLTRB(data.rc.left, data.rc.top, data.rc.right, data.rc.bottom);
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data.cbSize = (uint) Marshal.SizeOf(typeof(APPBARDATA));
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result = Shell32.SHAppBarMessage(ABM.GetState, ref data);
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var state = result.ToInt32();
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AlwaysOnTop = (state & ABS.AlwaysOnTop) == ABS.AlwaysOnTop;
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AutoHide = (state & ABS.Autohide) == ABS.Autohide;
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}
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public Rectangle Bounds { get; }
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public TaskbarPosition Position { get; private set; }
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public Point Location => Bounds.Location;
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public Size Size => Bounds.Size;
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//Always returns false under Windows 7
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public bool AlwaysOnTop { get; private set; }
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public bool AutoHide { get; private set; }
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}
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public enum ABM : uint
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{
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New = 0x00000000,
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Remove = 0x00000001,
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QueryPos = 0x00000002,
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SetPos = 0x00000003,
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GetState = 0x00000004,
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GetTaskbarPos = 0x00000005,
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Activate = 0x00000006,
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GetAutoHideBar = 0x00000007,
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SetAutoHideBar = 0x00000008,
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WindowPosChanged = 0x00000009,
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SetState = 0x0000000A
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}
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public enum ABE : uint
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{
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Left = 0,
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Top = 1,
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Right = 2,
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Bottom = 3
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}
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public static class ABS
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{
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public const int Autohide = 0x0000001;
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public const int AlwaysOnTop = 0x0000002;
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}
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public static class Shell32
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{
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[DllImport("shell32.dll", SetLastError = true)]
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public static extern IntPtr SHAppBarMessage(ABM dwMessage, [In] ref APPBARDATA pData);
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}
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public static class User32
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{
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[DllImport("user32.dll", SetLastError = true)]
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public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct APPBARDATA
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{
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public uint cbSize;
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public IntPtr hWnd;
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public uint uCallbackMessage;
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public ABE uEdge;
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public RECT rc;
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public int lParam;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct RECT
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{
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public int left;
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public int top;
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public int right;
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public int bottom;
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}
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} |