Window Tray Minimizer

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace Tray_minimizer
{
    static public class winapi
    {
        public static IntPtr statusbar;

        public delegate bool EnumWindowsProc(IntPtr hWnd, int lParam);

        #region WinApi Constants, Enums and structs

        public const int SW_HIDE = 0;
        public const int SW_MAXIMIZE = 3;
        public const int SW_MINIMIZE = 6;
        public const int SW_SHOW = 5;
        public const int SW_SHOWNA = 8;

        public const uint SHGFI_ICON = 0x100;
        public const uint SHGFI_LARGEICON = 0x0;
        public const uint SHGFI_SMALLICON = 0x1;

        public const int WM_HOTKEY = 0x0312;

        public const int WM_CLOSE = 0x10;
        public const int WM_SYSCOMMAND = 0x0112;

        [Flags]
        public enum ProcessAccessFlags : uint
        {
            All = 0x001F0FFF,
            Terminate = 0x00000001,
            CreateThread = 0x00000002,
            VMOperation = 0x00000008,
            VMRead = 0x00000010,
            VMWrite = 0x00000020,
            DupHandle = 0x00000040,
            SetInformation = 0x00000200,
            QueryInformation = 0x00000400,
            Synchronize = 0x00100000
        }

        [Flags]
        public enum KeyModifiers:uint
        {
            None = 0,
            Alt = 1,
            Control = 2,
            Shift = 4,
            Windows = 8
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct SHFILEINFO
        {
            public IntPtr hIcon;
            public IntPtr iIcon;
            public uint dwAttributes;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
            public string szDisplayName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
            public string szTypeName;
        };

        #endregion

        #region WinApi functions

        [DllImport("kernel32.dll")]
        public static extern IntPtr OpenProcess(ProcessAccessFlags dwDesiredAccess, bool bInheritHandle,
           uint dwProcessId);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool CloseHandle(IntPtr hHandle);

        [DllImport("Psapi.dll", SetLastError = true)]
        [PreserveSig]
        public static extern uint GetModuleFileNameEx([In]IntPtr hProcess, [In] IntPtr hModule, [Out] StringBuilder lpFilename,
            [In][MarshalAs(UnmanagedType.U4)]int nSize);

        [DllImport("shell32.dll")]
        public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags);
        
        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool DestroyIcon(IntPtr hIcon);

        [DllImport("user32.dll")]
        public static extern bool IsWindow(IntPtr hWnd);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

        [DllImport("user32.dll")]
        public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        public static extern int EnumWindows(EnumWindowsProc ewp, int lParam);

        [DllImport("user32.dll")]
        public static extern bool IsWindowVisible(IntPtr hWnd);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool IsIconic(IntPtr hWnd);

        [DllImport("user32.dll")]
        public static extern bool IsZoomed(IntPtr hWnd);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam,
           IntPtr lParam);

        [DllImport("user32.dll")]
        public static extern bool DestroyWindow(IntPtr hWnd);
        #endregion

    }
}