ステータスバーのペインの幅調整

void AdjustStatusBarPane(CCmdUI *pCmdUI, LPCTSTR pText)
{
  CStatusBar* pBar = (CStatusBar*)pCmdUI->m_pOther;
  UINT nID, nStyle;
  int cxWidth;
  pBar->GetPaneInfo(pCmdUI->m_nIndex, nID, nStyle, cxWidth);
  CDC* pDC = pBar->GetDC();
  CFont *pOldFont = pDC->SelectObject(pBar->GetFont());
  CSize size = pDC->GetTextExtent(pText);
  pDC->SelectObject(pOldFont);
  pBar->ReleaseDC(pDC);
  pBar->SetPaneInfo(pCmdUI->m_nIndex, nID, nStyle, size.cx);
}