Index: Core/Code/IO/mitkLog.cpp
===================================================================
--- Core/Code/IO/mitkLog.cpp	(revision 25905)
+++ Core/Code/IO/mitkLog.cpp	(working copy)
@@ -18,6 +18,7 @@
 #include "mitkLog.h"
 
 #include "itkSimpleFastMutexLock.h"
+#include <itkOutputWindow.h>
 
 #include <iostream>
 #include <fstream>
@@ -25,7 +26,15 @@
 static itk::SimpleFastMutexLock logMutex;
 static mitk::LogBackend *mitkLogBackend = 0;
 static std::ofstream *logFile = 0;
+static std::stringstream *outputWindow = 0;
+static bool logOutputWindow = false;
 
+void mitk::LogBackend::EnableOutputWindow(bool enable)
+{
+  logOutputWindow = enable;
+}
+
+
 void mitk::LogBackend::ProcessMessage(const mbilog::LogMessage& l )
 {
   logMutex.Lock();
@@ -43,7 +52,17 @@
       mbilog::BackendCout::FormatFull( *logFile, l );
     #endif
   }
-  
+  if(logOutputWindow)
+  {
+    if(outputWindow == NULL)
+      outputWindow = new std::stringstream();
+    #ifdef _WIN32
+      mbilog::BackendCout::FormatFull( *outputWindow, l, (int)GetCurrentThreadId() );
+    #else
+      mbilog::BackendCout::FormatFull( *outputWindow, l );
+    #endif
+    itk::OutputWindow::GetInstance()->DisplayText(outputWindow->str().c_str());
+  }
   logMutex.Unlock();
 }
 
Index: Core/Code/IO/mitkLog.h
===================================================================
--- Core/Code/IO/mitkLog.h	(revision 25905)
+++ Core/Code/IO/mitkLog.h	(working copy)
@@ -46,6 +46,8 @@
      /** \brief Sets extra log file path (additionally to the console log)
       */      
       static void SetLogFile(const char *file);
+
+      static void EnableOutputWindow(bool enable);
      
      /** \brief Automatically extracts and removes the "--logfile <file>" parameters from the standard C main(argc,argv) parameter list and calls SetLogFile if needed
       */