FreeYoDans OnPaint() :
CString cs;
cs.LoadString(IDS_STRING);
m_hButtonFont = ::CreateFont(14,0,0,0,600,0,0,0,0,0,0,0,0,"Verdana");
SendDlgItemMessage(IDCONTROL,WM_SETFONT, (WPARAM)m_hButtonFont, TRUE);
SetDlgItemText( IDCONTROL, cs.GetBuffer(cs.GetLength()) );
et avant de quitté :
DeleteObject(m_hButtonFont);