diff --git a/ObjNewGraphics.cpp b/ObjNewGraphics.cpp
index f17e793..a300019 100644
--- a/ObjNewGraphics.cpp
+++ b/ObjNewGraphics.cpp
@@ -28,7 +28,7 @@ ObjNewGraphics::~ObjNewGraphics( void)
 
 //----------------------------------------------------------------------------
 void
-ObjNewGraphics::Invalidate( void)
+ObjNewGraphics::Reset( void)
 {
    m_bValid = false ;
 }
diff --git a/ObjNewGraphics.h b/ObjNewGraphics.h
index 1170f45..55a512a 100644
--- a/ObjNewGraphics.h
+++ b/ObjNewGraphics.h
@@ -21,7 +21,7 @@ class ObjNewGraphics : public ObjEGrGraphics
    public :
       ObjNewGraphics( void) : m_pScene( nullptr), m_bValid( false), m_nMode( 0), m_nCount( 0) {}
       virtual ~ObjNewGraphics( void) ;
-      virtual void Invalidate( void) ;
+      virtual void Reset( void) ;
 
    public :
       virtual bool IsValid( void)
diff --git a/ObjOldGraphics.cpp b/ObjOldGraphics.cpp
index 5cffa97..6949b2d 100644
--- a/ObjOldGraphics.cpp
+++ b/ObjOldGraphics.cpp
@@ -24,7 +24,7 @@ ObjOldGraphics::~ObjOldGraphics( void)
 
 //----------------------------------------------------------------------------
 void
-ObjOldGraphics::Invalidate( void)
+ObjOldGraphics::Reset( void)
 {
    m_bValid = false ;
 }
diff --git a/ObjOldGraphics.h b/ObjOldGraphics.h
index 60c92c6..c3e2d7b 100644
--- a/ObjOldGraphics.h
+++ b/ObjOldGraphics.h
@@ -21,7 +21,7 @@ class ObjOldGraphics : public ObjEGrGraphics
    public :
       ObjOldGraphics( void) : m_pScene( nullptr), m_bValid( false), m_nMode( 0) {}
       virtual ~ObjOldGraphics( void) ;
-      virtual void Invalidate( void) ;
+      virtual void Reset( void) ;
 
    public :
       virtual bool IsValid( void)
diff --git a/SceneBasic.cpp b/SceneBasic.cpp
index a6f3835..31e40ed 100644
--- a/SceneBasic.cpp
+++ b/SceneBasic.cpp
@@ -135,9 +135,7 @@ Scene::CreateContext( HDC hDC, int nDriver, bool b2Buff, int nColorBits, int nDe
       attribs[1] = 3 ;
       attribs[2] = WGL_CONTEXT_MINOR_VERSION_ARB ;
       attribs[3] = 0 ;
-      attribs[4] = WGL_CONTEXT_PROFILE_MASK_ARB ;
-      attribs[5] = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB ;
-      attribs[6] = 0 ;
+      attribs[4] = 0 ;
    }
 
    if ( wglewIsSupported( "WGL_ARB_create_context") == 1) {