void OCCDemo_Presentation::SetViewScale(Quantity_Factor Coef)
{
	CMDIFrameWnd *pFrame =  (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;
	CMDIChildWnd *pChild =  (CMDIChildWnd *) pFrame->GetActiveFrame();
	COCCDemoView *pView = (COCCDemoView *) pChild->GetActiveView();
	pView->SetViewScale(Coef);
}