diff --git a/Plugins/Wox.Plugin.Folder/FolderPlugin.cs b/Plugins/Wox.Plugin.Folder/FolderPlugin.cs
index ed9127509c..da5525ffc9 100644
--- a/Plugins/Wox.Plugin.Folder/FolderPlugin.cs
+++ b/Plugins/Wox.Plugin.Folder/FolderPlugin.cs
@@ -23,6 +23,7 @@ namespace Wox.Plugin.Folder
         {
             this.context = context;
             this.context.API.BackKeyDownEvent += ApiBackKeyDownEvent;
+            this.context.API.ResultItemDropEvent += API_ResultItemDropEvent;
             InitialDriverList();
             if (FolderStorage.Instance.FolderLinks == null)
             {
@@ -31,6 +32,11 @@ namespace Wox.Plugin.Folder
             }
         }
 
+        void API_ResultItemDropEvent(Result result, IDataObject dropObject,DragEventArgs e)
+        {
+            e.Handled = true;
+        }
+
         private void ApiBackKeyDownEvent(WoxKeyDownEventArgs e)
         {
             string query = e.Query;
diff --git a/Plugins/Wox.Plugin.Program/Programs.cs b/Plugins/Wox.Plugin.Program/Programs.cs
index 92da2c1959..ded1fea3e3 100644
--- a/Plugins/Wox.Plugin.Program/Programs.cs
+++ b/Plugins/Wox.Plugin.Program/Programs.cs
@@ -115,9 +115,9 @@ namespace Wox.Plugin.Program
             }
         }
 
-        void API_ResultItemDropEvent(Result result, IDataObject dropObject)
+        void API_ResultItemDropEvent(Result result, IDataObject dropObject, DragEventArgs args)
         {
-            
+            args.Handled = true;
         }
 
         public static void IndexPrograms()
diff --git a/Wox.Core/Plugin/JsonRPCPlugin.cs b/Wox.Core/Plugin/JsonRPCPlugin.cs
index fd0514af36..877ff10e9b 100644
--- a/Wox.Core/Plugin/JsonRPCPlugin.cs
+++ b/Wox.Core/Plugin/JsonRPCPlugin.cs
@@ -8,6 +8,7 @@ using System.Windows.Forms;
 using Newtonsoft.Json;
 using Wox.Infrastructure.Logger;
 using Wox.Plugin;
+using Wox.Core.Exception;
 
 namespace Wox.Core.Plugin
 {
@@ -83,7 +84,7 @@ namespace Wox.Core.Plugin
         private void ExecuteWoxAPI(string method, object[] parameters)
         {
             MethodInfo methodInfo = PluginManager.API.GetType().GetMethod(method);
-            if (methodInfo != null) 
+            if (methodInfo != null)
             {
                 try
                 {
@@ -141,8 +142,7 @@ namespace Wox.Core.Plugin
                                     string error = errorReader.ReadToEnd();
                                     if (!string.IsNullOrEmpty(error))
                                     {
-                                        //todo:
-                                       // ErrorReporting.TryShowErrorMessageBox(error, new WoxJsonRPCException(error));
+                                        throw new WoxJsonRPCException(error);
                                     }
                                 }
                             }
@@ -151,9 +151,9 @@ namespace Wox.Core.Plugin
                     }
                 }
             }
-            catch
+            catch(System.Exception e)
             {
-                return null;
+                throw new WoxJsonRPCException(e.Message);
             }
             return null;
         }
diff --git a/Wox.CrashReporter/ReportWindow.xaml.cs b/Wox.CrashReporter/ReportWindow.xaml.cs
index 7a6ec983c5..05612cd9ca 100644
--- a/Wox.CrashReporter/ReportWindow.xaml.cs
+++ b/Wox.CrashReporter/ReportWindow.xaml.cs
@@ -19,6 +19,7 @@ using Wox.Core.UI;
 using Wox.Core.Updater;
 using Wox.Core.UserSettings;
 using Wox.Infrastructure.Http;
+using Wox.Infrastructure.Logger;
 
 namespace Wox.CrashReporter
 {
@@ -53,15 +54,12 @@ namespace Wox.CrashReporter
 
         private void SendReport()
         {
+            Hide();
             string error = string.Format("{{\"data\":{0}}}", ExceptionFormatter.FormatExcpetion(exception));
             string response = HttpRequest.Post(APIServer.ErrorReportURL, error, HttpProxy.Instance);
-            if (response.ToLower() == "ok")
+            if (response.ToLower() != "ok")
             {
-                MessageBox.Show(InternationalizationManager.Instance.GetTranslation("reportWindow_report_succeed"));
-            }
-            else
-            {
-                MessageBox.Show(InternationalizationManager.Instance.GetTranslation("reportWindow_report_failed"));
+                Log.Warn("sending crash report failed: " + response);
             }
             Dispatcher.Invoke(new Action(Close));
         }
diff --git a/Wox.Plugin/EventHandler.cs b/Wox.Plugin/EventHandler.cs
index 3aa31c938a..1bbe950a4f 100644
--- a/Wox.Plugin/EventHandler.cs
+++ b/Wox.Plugin/EventHandler.cs
@@ -10,7 +10,7 @@ namespace Wox.Plugin
     public delegate void WoxKeyDownEventHandler(WoxKeyDownEventArgs e);
     public delegate void AfterWoxQueryEventHandler(WoxQueryEventArgs e);
 
-    public delegate void ResultItemDropEventHandler(Result result, IDataObject dropObject);
+    public delegate void ResultItemDropEventHandler(Result result, IDataObject dropObject, DragEventArgs e);
 
     /// <summary>
     /// Global keyboard events
diff --git a/Wox/MainWindow.xaml.cs b/Wox/MainWindow.xaml.cs
index 7c200fbe26..fb7c1789fd 100644
--- a/Wox/MainWindow.xaml.cs
+++ b/Wox/MainWindow.xaml.cs
@@ -195,15 +195,17 @@ namespace Wox
             });
         }
 
-        void pnlResult_ItemDropEvent(Result result, IDataObject dropDataObject)
+        void pnlResult_ItemDropEvent(Result result, IDataObject dropDataObject, DragEventArgs args)
         {
-            if (ResultItemDropEvent != null)
+            PluginPair pluginPair = PluginManager.AllPlugins.FirstOrDefault(o => o.Metadata.ID == result.PluginID);
+            if (ResultItemDropEvent != null && pluginPair != null)
             {
-                PluginPair pluginPair = PluginManager.AllPlugins.FirstOrDefault(o => o.Plugin == ResultItemDropEvent.Target);
-                if (pluginPair != null)
+                foreach (var delegateHandler in ResultItemDropEvent.GetInvocationList())
                 {
-                    //todo:
-                    ResultItemDropEvent(result, dropDataObject);
+                    if (delegateHandler.Target == pluginPair.Plugin)
+                    {
+                        delegateHandler.DynamicInvoke(result, dropDataObject, args);
+                    }
                 }
             }
         }
diff --git a/Wox/ResultPanel.xaml.cs b/Wox/ResultPanel.xaml.cs
index 18ddd76707..2a1d217175 100644
--- a/Wox/ResultPanel.xaml.cs
+++ b/Wox/ResultPanel.xaml.cs
@@ -16,7 +16,7 @@ namespace Wox
     {
         public event Action<Result> LeftMouseClickEvent;
         public event Action<Result> RightMouseClickEvent;
-        public event Action<Result,IDataObject> ItemDropEvent;
+        public event Action<Result, IDataObject, DragEventArgs> ItemDropEvent;
 
         protected virtual void OnRightMouseClick(Result result)
         {
@@ -215,14 +215,14 @@ namespace Wox
             var item = ItemsControl.ContainerFromElement(lbResults, e.OriginalSource as DependencyObject) as ListBoxItem;
             if (item != null)
             {
-                OnItemDropEvent(item.DataContext as Result,e.Data);
+                OnItemDropEvent(item.DataContext as Result, e.Data, e);
             }
         }
 
-        protected virtual void OnItemDropEvent(Result obj, IDataObject data)
+        protected virtual void OnItemDropEvent(Result obj, IDataObject data, DragEventArgs e)
         {
             var handler = ItemDropEvent;
-            if (handler != null) handler(obj,data);
+            if (handler != null) handler(obj, data, e);
         }
     }
 }
\ No newline at end of file
diff --git a/appveyor.yml b/appveyor.yml
index 76871e1456..429a0011e1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,7 +15,6 @@ build:
 after_test:
     - ps: .\deploy\nuget\pack.ps1
     - cmd: .\deploy\UpdateGenerator\build.bat
-    #- cmd: .\deploy\Cleanup.bat
 
 deploy:
     provider: NuGet