diff --git a/examples/slideshow3D/slideshow3D.cpp b/examples/slideshow3D/slideshow3D.cpp
index 05b87724a..9560d4692 100644
--- a/examples/slideshow3D/slideshow3D.cpp
+++ b/examples/slideshow3D/slideshow3D.cpp
@@ -42,7 +42,9 @@ public:
         
 };
 
-
+// add in because MipsPro can't handle no osgGA infront of TrackballManipulator
+// but VisualStudio6.0 can't handle the osgGA...
+using namespace osgGA;
 class SlideShowTrackballManipulator : public osgGA::TrackballManipulator
 {
     public: