Added missing JUCE_API flags.

modules/juce_core/system/juce_PlatformDefs.h

@@ -41,8 +41,16 @@
 
 /** This macro defines the C calling convention used as the standard for Juce calls. */
 #if JUCE_MSVC
- #define JUCE_CALLTYPE   __stdcall
- #define JUCE_CDECL      __cdecl
+ #ifdef JUCE_DLL_BUILD
+  #define JUCE_CALLTYPE   __stdcall __declspec (dllexport)
+  #define JUCE_CDECL      __cdecl   __declspec (dllexport)
+ #elif defined (JUCE_DLL)
+  #define JUCE_CALLTYPE   __stdcall __declspec (dllimport)
+  #define JUCE_CDECL      __cdecl   __declspec (dllimport)
+ #else
+  #define JUCE_CALLTYPE   __stdcall
+  #define JUCE_CDECL      __cdecl
+ #endif
 #else
  #define JUCE_CALLTYPE
  #define JUCE_CDECL

modules/juce_gui_basics/widgets/juce_Slider.h

@@ -494,7 +494,7 @@ public:
 
         @see Slider::addListener, Slider::removeListener
     */
-    class Listener
+    class JUCE_API  Listener
     {
     public:
         //==============================================================================

modules/juce_gui_basics/widgets/juce_TextEditor.h

@@ -282,7 +282,7 @@ public:
 
         @see TextEditor::addListener
     */
-    class Listener
+    class JUCE_API  Listener
     {
     public:
         /** Destructor. */