Win dll compile error.

GUI/coregui/utils/IMessageService.h

@@ -17,11 +17,12 @@
 #ifndef IMESSAGESERVICE_H
 #define IMESSAGESERVICE_H
 
+#include "WinDllMacros.h"
+
 //! @class IMessageService
 //! @brief Abstract class for messaging in our GUI
 
-
-class IMessageService {
+class BA_CORE_API_ IMessageService {
 public:
     IMessageService(){}
     virtual ~IMessageService(){}

GUI/coregui/utils/WarningMessageService.h

@@ -27,7 +27,7 @@ class QObject;
 //! @class WarningMessageService
 //! @brief The service to collect warning messages from different senders.
 
-class WarningMessageService : public IMessageService {
+class BA_CORE_API_ WarningMessageService : public IMessageService {
 public:
     typedef QMap<QObject *, MessageContainer *> container_t;
     typedef container_t::iterator iterator;