From Almalric Alexandre, "I've noticed that all osgViewerMFC example from osg 2.x.x are flickering when resizing 3D view, to avoid this only add OnEraseBkgnd callback in CMFC_OSG_MDIView class and do nothing in it. Just like the WxWidget example.

Attached the modified version of MFC_OSG_MDIView.cpp and MFC_OSG_MDIView.h."

Note from Robert Osfield, submission came with wrong header file, so have had
to guess at what it should be, fingers crossed it worn't break windows build... :-)

examples/osgviewerMFC/MFC_OSG_MDIView.cpp

@@ -17,6 +17,7 @@ BEGIN_MESSAGE_MAP(CMFC_OSG_MDIView, CView)
     ON_WM_CREATE()
     ON_WM_DESTROY()
     ON_WM_KEYDOWN()
+    ON_WM_ERASEBKGND()
 END_MESSAGE_MAP()
 
 CMFC_OSG_MDIView::CMFC_OSG_MDIView() :
@@ -107,3 +108,9 @@ void CMFC_OSG_MDIView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
     }
 }
 
+
+BOOL CMFC_OSG_MDIView::OnEraseBkgnd(CDC* pDC)
+{
+    /* Do nothing, to avoid flashing on MSW */
+    return true;
+}

examples/osgviewerMFC/MFC_OSG_MDIView.h

@@ -43,6 +43,7 @@ protected:
     afx_msg int  OnCreate(LPCREATESTRUCT lpCreateStruct);
     afx_msg void OnDestroy();
     afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
+    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
 };
 
 #ifndef _DEBUG  // debug version in MFC_OSG_MDIView.cpp