--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ShortcutKeyFinder/Win32Helpers.cs	Sat Jun 25 13:42:54 2016 +1000
@@ -0,0 +1,297 @@
+using System;
+using System.Drawing;
+using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.ComTypes;
+using System.Text;
+
+namespace ShortcutKeyFinder
+{
+    /// <summary>Various functions to call the Win32 API</summary>
+    /// <remarks>Method signatures taken from http://www.pinvoke.net/ </remarks>
+    class Win32Helpers
+    {
+        public const int STGM_READ = 0x00000000;
+        public const int STGM_READWRITE = 0x00000002;
+        public const int ILD_NORMAL = 0;
+        public const int SW_SHOWNORMAL = 1;
+        public const uint SEE_MASK_INVOKEIDLIST = 0x0000000C;
+        public const uint BCM_SETSHIELD = 0x160C;
+        public const int SHGFI_SMALLICON = 0x000000001;
+        public const int SHGFI_ICON         = 0x000000100;
+        public const int SHGFI_DISPLAYNAME  = 0x000000200;
+        public const int SHGFI_SYSICONINDEX = 0x000004000;
+
+
+        #region GetShortcutHotkey, SetShortcutHotkey
+
+        // The CharSet must match the CharSet of the corresponding PInvoke signature
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+        struct WIN32_FIND_DATAW
+        {
+            public uint dwFileAttributes;
+            public System.Runtime.InteropServices.ComTypes.FILETIME ftCreationTime;
+            public System.Runtime.InteropServices.ComTypes.FILETIME ftLastAccessTime;
+            public System.Runtime.InteropServices.ComTypes.FILETIME ftLastWriteTime;
+            public uint nFileSizeHigh;
+            public uint nFileSizeLow;
+            public uint dwReserved0;
+            public uint dwReserved1;
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
+            public string cFileName;
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)]
+            public string cAlternateFileName;
+        }
+
+        /// <summary>IShellLink.GetPath fFlags: Flags that specify the type of path information to retrieve</summary>
+        [Flags()]
+        enum SLGP_FLAGS
+        {
+            /// <summary>Retrieves the standard short (8.3 format) file name</summary>
+            SLGP_SHORTPATH = 0x1,
+            /// <summary>Retrieves the Universal Naming Convention (UNC) path name of the file</summary>
+            SLGP_UNCPRIORITY = 0x2,
+            /// <summary>Retrieves the raw path name. A raw path is something that might not exist and may include environment variables that need to be expanded</summary>
+            SLGP_RAWPATH = 0x4
+        }
+
+        /// <summary>IShellLink.Resolve fFlags</summary>
+        [Flags()]
+        enum SLR_FLAGS
+        {
+            /// <summary>
+            /// Do not display a dialog box if the link cannot be resolved. When SLR_NO_UI is set,
+            /// the high-order word of fFlags can be set to a time-out value that specifies the
+            /// maximum amount of time to be spent resolving the link. The function returns if the
+            /// link cannot be resolved within the time-out duration. If the high-order word is set
+            /// to zero, the time-out duration will be set to the default value of 3,000 milliseconds
+            /// (3 seconds). To specify a value, set the high word of fFlags to the desired time-out
+            /// duration, in milliseconds.
+            /// </summary>
+            SLR_NO_UI = 0x1,
+            /// <summary>Obsolete and no longer used</summary>
+            SLR_ANY_MATCH = 0x2,
+            /// <summary>If the link object has changed, update its path and list of identifiers.
+            /// If SLR_UPDATE is set, you do not need to call IPersistFile::IsDirty to determine
+            /// whether or not the link object has changed.</summary>
+            SLR_UPDATE = 0x4,
+            /// <summary>Do not update the link information</summary>
+            SLR_NOUPDATE = 0x8,
+            /// <summary>Do not execute the search heuristics</summary>
+            SLR_NOSEARCH = 0x10,
+            /// <summary>Do not use distributed link tracking</summary>
+            SLR_NOTRACK = 0x20,
+            /// <summary>Disable distributed link tracking. By default, distributed link tracking tracks
+            /// removable media across multiple devices based on the volume name. It also uses the
+            /// Universal Naming Convention (UNC) path to track remote file systems whose drive letter
+            /// has changed. Setting SLR_NOLINKINFO disables both types of tracking.</summary>
+            SLR_NOLINKINFO = 0x40,
+            /// <summary>Call the Microsoft Windows Installer</summary>
+            SLR_INVOKE_MSI = 0x80
+        }
+
+        /// <summary>The IShellLink interface allows Shell links to be created, modified, and resolved</summary>
+        [ComImport(), InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("000214F9-0000-0000-C000-000000000046")]
+        interface IShellLinkW
+        {
+            /// <summary>Retrieves the path and file name of a Shell link object</summary>
+            void GetPath([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszFile, int cchMaxPath, out WIN32_FIND_DATAW pfd, SLGP_FLAGS fFlags);
+            /// <summary>Retrieves the list of item identifiers for a Shell link object</summary>
+            void GetIDList(out IntPtr ppidl);
+            /// <summary>Sets the pointer to an item identifier list (PIDL) for a Shell link object.</summary>
+            void SetIDList(IntPtr pidl);
+            /// <summary>Retrieves the description string for a Shell link object</summary>
+            void GetDescription([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszName, int cchMaxName);
+            /// <summary>Sets the description for a Shell link object. The description can be any application-defined string</summary>
+            void SetDescription([MarshalAs(UnmanagedType.LPWStr)] string pszName);
+            /// <summary>Retrieves the name of the working directory for a Shell link object</summary>
+            void GetWorkingDirectory([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszDir, int cchMaxPath);
+            /// <summary>Sets the name of the working directory for a Shell link object</summary>
+            void SetWorkingDirectory([MarshalAs(UnmanagedType.LPWStr)] string pszDir);
+            /// <summary>Retrieves the command-line arguments associated with a Shell link object</summary>
+            void GetArguments([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszArgs, int cchMaxPath);
+            /// <summary>Sets the command-line arguments for a Shell link object</summary>
+            void SetArguments([MarshalAs(UnmanagedType.LPWStr)] string pszArgs);
+            /// <summary>Retrieves the hot key for a Shell link object</summary>
+            void GetHotkey(out ushort pwHotkey);
+            /// <summary>Sets a hot key for a Shell link object</summary>
+            void SetHotkey(ushort wHotkey);
+            /// <summary>Retrieves the show command for a Shell link object</summary>
+            void GetShowCmd(out int piShowCmd);
+            /// <summary>Sets the show command for a Shell link object. The show command sets the initial show state of the window.</summary>
+            void SetShowCmd(int iShowCmd);
+            /// <summary>Retrieves the location (path and index) of the icon for a Shell link object</summary>
+            void GetIconLocation([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszIconPath,
+                int cchIconPath, out int piIcon);
+            /// <summary>Sets the location (path and index) of the icon for a Shell link object</summary>
+            void SetIconLocation([MarshalAs(UnmanagedType.LPWStr)] string pszIconPath, int iIcon);
+            /// <summary>Sets the relative path to the Shell link object</summary>
+            void SetRelativePath([MarshalAs(UnmanagedType.LPWStr)] string pszPathRel, int dwReserved);
+            /// <summary>Attempts to find the target of a Shell link, even if it has been moved or renamed</summary>
+            void Resolve(IntPtr hwnd, SLR_FLAGS fFlags);
+            /// <summary>Sets the path and file name of a Shell link object</summary>
+            void SetPath([MarshalAs(UnmanagedType.LPWStr)] string pszFile);
+        }
+
+        /// <summary>Retrieves the hotkey assigned to a shortcut (.lnk) file</summary>
+        /// <param name="path">Path to a shortcut (.lnk) file</param>
+        /// <returns>A binary value representing the shortcut's hotkey</returns>
+        public static ushort GetShortcutHotkey(string path)
+        {
+            Type obj = Type.GetTypeFromCLSID(new Guid("00021401-0000-0000-C000-000000000046"), true);
+            IShellLinkW link = Activator.CreateInstance(obj) as IShellLinkW;
+
+            ((IPersistFile)link).Load(path, STGM_READ);
+            ushort hotkey;
+            link.GetHotkey(out hotkey);
+            return hotkey;
+        }
+
+        /// <summary>Assigns a hotkey to a shortcut (.lnk) file</summary>
+        /// <param name="path">Path to an exising shortcut (.lnk) file to modify</param>
+        /// <param name="hotkey">Binary value containing the hotkey to set</param>
+        public static bool SetShortcutHotkey(string path, ushort hotkey)
+        {
+            Type obj = Type.GetTypeFromCLSID(new Guid("00021401-0000-0000-C000-000000000046"), true);
+            IShellLinkW link = Activator.CreateInstance(obj) as IShellLinkW;
+
+            try
+            {
+                ((IPersistFile)link).Load(path, STGM_READWRITE);
+                link.SetHotkey(hotkey);
+                ((IPersistFile)link).Save(path, false);
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        #endregion
+
+        #region GetFileInfo
+
+        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
+        public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);
+
+        [DllImport("comctl32.dll", SetLastError = true)]
+        public static extern IntPtr ImageList_GetIcon(IntPtr himl, int i, int flags);
+
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
+        public struct SHFILEINFO
+        {
+            public IntPtr hIcon;
+            public int iIcon;
+            public uint dwAttributes;
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
+            public string szDisplayName;
+            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
+            public string szTypeName;
+        };
+
+        /// <summary>Retrieves the hotkey assigned to a shortcut (.lnk) file</summary>
+        /// <param name="path">Path of the file to retreive properties from</param>
+        /// <param name="smallIcon">Set to true to retreive the 16x16 icon. By default, the 32x32 icon is retrieved.</param>
+        /// <param name="noOverlays">Set to true to remove icon overlays as displayed in Windows Explorer (for example, the shortcut arrow)</param>
+        public static FileInfo GetFileInfo(string path, bool smallIcon = false, bool noOverlays = false)
+        {
+            SHFILEINFO info = new SHFILEINFO();
+            uint flags = SHGFI_DISPLAYNAME;
+            if (smallIcon)
+                flags |= SHGFI_SMALLICON;
+            if (noOverlays)
+                flags |= SHGFI_SYSICONINDEX;
+            else
+                flags |= SHGFI_ICON;
+            IntPtr shgfi = SHGetFileInfo(path, 0, ref info, (uint)Marshal.SizeOf(info), flags);
+
+            if (shgfi == IntPtr.Zero)
+                return null;
+
+            if (noOverlays)
+            {
+                IntPtr icon = ImageList_GetIcon(shgfi, info.iIcon, ILD_NORMAL);
+                return new FileInfo(info.szDisplayName, icon != IntPtr.Zero ? Icon.FromHandle(icon) : null);
+            }
+            else
+                return new FileInfo(info.szDisplayName, Icon.FromHandle(info.hIcon));
+        }
+
+        #endregion
+
+        #region ShowFilePropertiesWindow
+
+        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
+        static extern bool ShellExecuteEx(ref SHELLEXECUTEINFO lpExecInfo);
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct SHELLEXECUTEINFO
+        {
+            public int cbSize;
+            public uint fMask;
+            public IntPtr hwnd;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string lpVerb;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string lpFile;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string lpParameters;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string lpDirectory;
+            public int nShow;
+            public IntPtr hInstApp;
+            public IntPtr lpIDList;
+            [MarshalAs(UnmanagedType.LPTStr)]
+            public string lpClass;
+            public IntPtr hkeyClass;
+            public uint dwHotKey;
+            public IntPtr hIcon;
+            public IntPtr hProcess;
+        }
+
+        /// <summary>Displays the Properties window of a file</summary>
+        /// <param name="path">File to display the properties window for</param>
+        /// <param name="parentWindow">Handle to the parent window for error messages to be displayed</param>
+        public static void ShowFilePropertiesWindow(string path, IntPtr parentWindow = default(IntPtr))
+        {
+            SHELLEXECUTEINFO info = new SHELLEXECUTEINFO();
+            info.cbSize = Marshal.SizeOf(info);
+            info.fMask = SEE_MASK_INVOKEIDLIST;
+            info.hwnd = parentWindow;
+            info.lpVerb = "properties";
+            info.lpFile = path;
+            info.nShow = SW_SHOWNORMAL;
+            ShellExecuteEx(ref info);
+        }
+
+        #endregion
+
+        #region AddUacShield
+
+        [DllImport("user32", CharSet = CharSet.Auto, SetLastError = true)]
+        static extern int SendMessage(IntPtr hWnd, UInt32 Msg, int wParam, IntPtr lParam);
+
+        /// <summary>Adds a UAC shield icon to a button</summary>
+        /// <param name="button">Button to add the shield icon to</param>
+        public static void AddUacShield(System.Windows.Forms.Button button)
+        {
+            button.FlatStyle = System.Windows.Forms.FlatStyle.System;
+            SendMessage(button.Handle, BCM_SETSHIELD, 0, (IntPtr)1);
+        }
+
+        #endregion
+    }
+
+    /// <summary>Class to hold basic file information</summary>
+    class FileInfo
+    {
+        public string DisplayName;
+        public Icon Icon;
+
+        public FileInfo(string DisplayName, Icon Icon)
+        {
+            this.DisplayName = DisplayName;
+            this.Icon = Icon;
+        }
+    }
+}