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CStatic* pStaticWater = (CStatic*)dlg->GetDlgItem(IDC_STATIC_WATER_STATUS);
CDC* pDc = pStaticWater->GetDC();
CRect ocxRect;
pStaticWater->GetClientRect(&ocxRect);
pDc->SetBkColor(RGB(255,0,0));
pDc->FillSolidRect(ocxRect, RGB(255,255,0));
pStaticWater->Invalidate(TRUE);
pStaticWater->ReleaseDC(pDc);