private: System::Void Form1_Shown(System::Object^  sender, System::EventArgs^  e) {
			 m_refreshTimer->Interval = (int)1000/60;
			 m_refreshTimer->Elapsed += gcnew System::Timers::ElapsedEventHandler ( this, &Form1::refreshClient );
			 m_refreshTimer->Enabled = TRUE;
			 m_refreshTimer->Start();
		 }
		 void refreshClient ( Object^ source, ElapsedEventArgs^ e ) {
			PaintEventArgs ^ptArgs = gcnew PaintEventArgs(this->CreateGraphics(), this->DisplayRectangle);
			m_gl->Render();
			m_gl->SwapOpenGLBuffers();
			// this->Update();
			if (this->InvokeRequired)
				this->InvokePaint(this, ptArgs);
			else
				this->Refresh();
		 }

		virtual System::Void Render(System::Void)
		{
			// Clear the color and depth buffers.
			glClearColor(0.0f, 0.0f, 0.0f, 0.0f) ;
			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
			glColor4f (1., 1., 1., 1.);
			glLoadIdentity();
			glScalef (1., 1., -1.);
			glTranslatef (0., 0., 5.);
			glRotatef(m_tRot, 0., 0., 1.);
			glDisable (GL_TEXTURE_2D);
			glBegin (GL_TRIANGLE_STRIP);
			glVertex3f (-1., -1., 0.);
			glVertex3f (1., -1., 0.);
			glVertex3f (-1., 1., 0.);
			glVertex3f (1., 1., 0.);
			glEnd();
			m_tRot += 0.5;
		}		

		System::Void SwapOpenGLBuffers(System::Void)
		{
			SwapBuffers(m_hDC);
		}