Mostly we can use the WM_TIMER of CWnd to recieve the data and refresh the Data Visualization Screen, if you want to update only one shape, just call UpdateControl of this shape, but if you want to update a list of shapes one time, we recommend you to call UpdateShapes, this will works more effective, below is the sample codes：

void CAutoDemoView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	if(nIDEvent == ID_TIMER_ID)
	{
		CFODrawShapeList lstUpdate;
		int xx0 = rand() % 20;
		int xx1 = rand() % 18;
		int xx2 = rand() % 25;
		int xx3 = rand() % 16;
		int xx4 = rand() % 12;
		int xx5 = rand() % 21;
		if(pK1 != NULL)
		{
			CString strText;
			strText.Format(_T("%u mcA"), xx0 * xx1);
			pK1->SetLabelText(strText);
			lstUpdate.AddTail(pK1);

		}
		if(pK2 != NULL)
		{
			CString strText;
			strText.Format(_T("%u C"), xx0 * xx2);
			pK2->SetLabelText(strText);
			lstUpdate.AddTail(pK2);
		}

		if(pK3 != NULL)
		{
			CString strText;
			strText.Format(_T("%u Nm/h"), xx0 * xx3);
			pK3->SetLabelText(strText);
			lstUpdate.AddTail(pK3);
		}


		if(pX1 != NULL)
		{
			CString strText;
			strText.Format(_T("%u"), xx0 * xx4);
			pX1->SetLabelText(strText);
			lstUpdate.AddTail(pX1);

			int nValue = xx0 * xx4;
			if(nValue > 200)
			{
				pX1->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX1->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX1->SetBkColor(RGB(0,0,0));
			}
		}

		if(pX2 != NULL)
		{
			CString strText;
			strText.Format(_T("%u"), xx0 * xx5);
			pX2->SetLabelText(strText);
			lstUpdate.AddTail(pX2);

			int nValue = xx0 * xx5;
			if(nValue > 200)
			{
				pX2->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX2->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX2->SetBkColor(RGB(0,0,0));
			}
		}

		if(pX3 != NULL)
		{
			CString strText;
			strText.Format(_T("-%u"), xx1 * xx5);
			pX3->SetLabelText(strText);
			lstUpdate.AddTail(pX3);

			int nValue = xx1 * xx5;
			if(nValue > 200)
			{
				pX3->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX3->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX3->SetBkColor(RGB(0,0,0));
			}
		}

		if(pX4 != NULL)
		{
			CString strText;
			strText.Format(_T("%u"), xx2 * xx3);
			pX4->SetLabelText(strText);
			lstUpdate.AddTail(pX4);

			int nValue = xx2 * xx3;
			if(nValue > 200)
			{
				pX4->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX4->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX4->SetBkColor(RGB(0,0,0));
			}
		}


		if(pX5 != NULL)
		{
			CString strText;
			strText.Format(_T("%u"), xx2 * xx4);
			pX5->SetLabelText(strText);
			lstUpdate.AddTail(pX5);

			int nValue = xx2 * xx4;
			if(nValue > 200)
			{
				pX5->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX5->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX5->SetBkColor(RGB(0,0,0));
			}
		}

		
		if(pX6 != NULL)
		{
			CString strText;
			strText.Format(_T("%u"), xx3 * xx5);
			pX6->SetLabelText(strText);
			lstUpdate.AddTail(pX6);

			int nValue = xx3 * xx5;
			if(nValue > 200)
			{
				pX6->SetBkColor(RGB(255,0,0));
			}
			else if(nValue > 100)
			{
				pX6->SetBkColor(RGB(255,255,0));
			}
			else
			{
				pX5->SetBkColor(RGB(0,0,0));
			}
		}

		if(pChartShape != NULL)
		{
			pChartShape->UpdateData(xx0 * xx1, xx0 * xx2, xx0 * xx3);
			lstUpdate.AddTail(pChartShape);
		}

		if(lstUpdate.GetCount() > 0)
		{
			UpdateShapes(&lstUpdate);
		}
	}
	else
	{
		CFODrawView::OnTimer(nIDEvent);
	}
}

If you want to handle the click event, you can DoButtonClickEvent to do that.

That's all, below is the running - time mode of this sample.

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Download this Data Visualization Sample 1