diff --git a/source/Client/BugTrapNet.h b/source/Client/BugTrapNet.h
index b72aac0..5bb2dbf 100644
--- a/source/Client/BugTrapNet.h
+++ b/source/Client/BugTrapNet.h
@@ -47,7 +47,8 @@ namespace IntelleSoft
 			ShowUI     = BTA_SHOWUI,
 			SaveReport = BTA_SAVEREPORT,
 			MailReport = BTA_MAILREPORT,
-			SendReport = BTA_SENDREPORT
+			SendReport = BTA_SENDREPORT,
+            Custom = BTA_CUSTOM
 		};
 
 		[Flags]
@@ -373,6 +374,8 @@ namespace IntelleSoft
 
 		public delegate void UnhandledExceptionDelegate(Object^ sender, UnhandledExceptionEventArgs^ args);
 
+        public delegate void CustomActivityDelegate(Object^ sender, String^ reportFilePath);
+
 		public ref class ExceptionHandler
 		{
 		private:
@@ -391,6 +394,7 @@ namespace IntelleSoft
 
 			static void ValidateIoResult(BOOL bResult);
 
+            static event CustomActivityDelegate^ customActivityEvent;
 		internal:
 			static property System::Exception^ Exception
 			{
@@ -418,7 +422,7 @@ namespace IntelleSoft
 
 			static void FireBeforeUnhandledExceptionEvent(void);
 			static void FireAfterUnhandledExceptionEvent(void);
-
+            static void FireCustomActivityEvent(String^ reportFilePath);
 		public:
 			static const int HttpPort = BUGTRAP_HTTP_PORT;
 
@@ -434,6 +438,12 @@ namespace IntelleSoft
 				void remove(UnhandledExceptionDelegate^ value);
 			}
 
+            static event CustomActivityDelegate^ CustomActivity
+            {
+                void add(CustomActivityDelegate^ value);
+                void remove(CustomActivityDelegate^ value);
+            }
+
 			static property String^ AppName
 			{
 				String^ get(void);
@@ -596,6 +606,11 @@ namespace IntelleSoft
 			afterUnhandledExceptionEvent(Sender, Arguments);
 		}
 
+        inline void ExceptionHandler::FireCustomActivityEvent(String^ reportFilePath)
+		{
+			customActivityEvent(Sender, reportFilePath);
+		}
+
 		inline void ExceptionHandler::BeforeUnhandledException::add(UnhandledExceptionDelegate^ value)
 		{
 			beforeUnhandledExceptionEvent += value;
@@ -616,6 +631,16 @@ namespace IntelleSoft
 			afterUnhandledExceptionEvent -= value;
 		}
 
+        inline void ExceptionHandler::CustomActivity::add(CustomActivityDelegate^ value)
+        {
+            customActivityEvent += value;
+        }
+
+        inline void ExceptionHandler::CustomActivity::remove(CustomActivityDelegate^ value)
+        {
+            customActivityEvent -= value;
+        }
+
 		inline String^ ExceptionHandler::AppName::get(void)
 		{
 			return gcnew String(BT_GetAppName());
diff --git a/source/Client/BugTrapUI.cpp b/source/Client/BugTrapUI.cpp
index 7daa75e..756bcc3 100644
--- a/source/Client/BugTrapUI.cpp
+++ b/source/Client/BugTrapUI.cpp
@@ -28,6 +28,10 @@
 #include "MemStream.h"
 #include "VersionInfoString.h"
 
+#ifdef _MANAGED
+#include "NetThunks.h"
+#endif
+
 #ifdef _DEBUG
 #define new DEBUG_NEW
 #endif
@@ -1359,8 +1363,12 @@ static void ExecuteHandlerAction(void)
 			}
 			break;
 		case BTA_CUSTOM:
-			if (g_pfnCustomActivityHandler != NULL)
-				(*g_pfnCustomActivityHandler)(g_szInternalReportFilePath, g_nCustomActivityHandlerParam);
+#ifdef _MANAGED
+            NetThunks::FireCustomActivityEvent(g_szInternalReportFilePath);
+#else
+            if (g_pfnCustomActivityHandler != NULL)
+                (*g_pfnCustomActivityHandler)(g_szInternalReportFilePath, g_nCustomActivityHandlerParam);
+#endif // _MANAGED
 
 			break;
 		}
diff --git a/source/Client/NetThunks.cpp b/source/Client/NetThunks.cpp
index 082f666..3dc69f3 100644
--- a/source/Client/NetThunks.cpp
+++ b/source/Client/NetThunks.cpp
@@ -504,6 +504,18 @@ namespace NetThunks
 		}
 	}
 
+    void FireCustomActivityEvent(LPCTSTR pszReportFilePath)
+    {
+        try
+        {
+            ExceptionHandler::FireCustomActivityEvent(gcnew String(pszReportFilePath));
+        }
+        catch (Exception^ exception)
+        {
+            Debug::WriteLine(exception);
+        }
+    }
+
 	void FlushTraceListeners(void)
 	{
 		try
diff --git a/source/Client/NetThunks.h b/source/Client/NetThunks.h
index 4170959..acb81fc 100644
--- a/source/Client/NetThunks.h
+++ b/source/Client/NetThunks.h
@@ -146,6 +146,8 @@ namespace NetThunks
 
 	void FireAfterUnhandledExceptionEvent(void);
 
+    void FireCustomActivityEvent(LPCTSTR pszReportFilePath);
+
 	void FlushTraceListeners(void);
 
 	inline gcroot<Thread^> GetCurrentThread(void)