fix program plugin doesn't work in XP issue.

WinAlfred.Plugin.System/DirectoryIndicator.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace WinAlfred.Plugin.System
+{
+    public class DirectoryIndicator : ISystemPlugin
+    {
+        public List<Result> Query(Query query)
+        {
+            List<Result> results = new List<Result>();
+            if (string.IsNullOrEmpty(query.RawQuery)) return results;
+
+            if (CheckIfDirectory(query.RawQuery))
+            {
+                Result result = new Result
+                {
+                    Title = "Open this directory",
+                    SubTitle = string.Format("path: {0}", query.RawQuery),
+                    Score = 50,
+                    IcoPath = "Images/folder.png",
+                    Action = () =>  Process.Start(query.RawQuery)
+                };
+                results.Add(result); 
+            }
+
+            return results;
+        }
+
+        private bool CheckIfDirectory(string path)
+        {
+            return Directory.Exists(path);
+        }
+
+        public void Init(PluginInitContext context)
+        {
+        }
+
+        public string Name
+        {
+            get
+            {
+                return "DirectoryIndicator";
+            }
+        }
+
+        public string Description
+        {
+            get
+            {
+                return "DirectoryIndicator";
+            }
+        }
+    }
+}

WinAlfred.Plugin.System/Programs.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
+using System.Runtime.InteropServices;
 using System.Text;
 using System.Windows.Forms;
 using Microsoft.Win32;
@@ -27,6 +28,12 @@ namespace WinAlfred.Plugin.System
 
         List<Program> installedList = new List<Program>();
 
+
+        [DllImport("shell32.dll")]
+        static extern bool SHGetSpecialFolderPath(IntPtr hwndOwner,[Out] StringBuilder lpszPath, int nFolder, bool fCreate);
+        const int CSIDL_COMMON_STARTMENU = 0x16;  // \Windows\Start Menu\Programs
+        const int CSIDL_COMMON_PROGRAMS = 0x17;
+
         public List<Result> Query(Query query)
         {
             if (string.IsNullOrEmpty(query.RawQuery) || query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
@@ -64,7 +71,10 @@ namespace WinAlfred.Plugin.System
         public void Init(PluginInitContext context)
         {
             indexDirectory.Add(Environment.GetFolderPath(Environment.SpecialFolder.Programs));
-            indexDirectory.Add(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData) + @"\Microsoft\Windows\Start Menu\Programs");
+
+            StringBuilder commonStartMenuPath = new StringBuilder(560);
+            SHGetSpecialFolderPath(IntPtr.Zero, commonStartMenuPath, CSIDL_COMMON_PROGRAMS, false);
+            indexDirectory.Add(commonStartMenuPath.ToString());
 
             GetAppFromStartMenu();
         }

WinAlfred.Plugin.System/WinAlfred.Plugin.System.csproj

@@ -41,6 +41,7 @@
   <ItemGroup>
     <Compile Include="CMD.cs" />
     <Compile Include="Common\ChineseToPinYin.cs" />
+    <Compile Include="DirectoryIndicator.cs" />
     <Compile Include="ISystemPlugin.cs" />
     <Compile Include="Programs.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />