case WM_CREATE:
  hdc = GetDC(hwnd);
  for(int i=0; i<4; i++)
   Rectangle(hdc, rect[i].left, rect[i].top, rect[i].right, rect[i].bottom);
  DrawText(hdc, "상", 2, &rect[0], DT_SINGLELINE | DT_VCENTER | DT_CENTER);
  DrawText(hdc, "하", 2, &rect[1], DT_SINGLELINE | DT_VCENTER | DT_CENTER);
  DrawText(hdc, "좌", 2, &rect[2], DT_SINGLELINE | DT_VCENTER | DT_CENTER);
  DrawText(hdc, "우", 2, &rect[3], DT_SINGLELINE | DT_VCENTER | DT_CENTER);
  ReleaseDC(hwnd, hdc);
  break;
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