X0201 42003-12-17 0000899171 CDW CORP CDWC 0000942499 KRASNY MICHARLE P 200 NORTH MILWAUKEE AVENUE VERNON HILLS IL 60061 1010Common Stock, $.01 par value2003-12-175G0266859.96D22403263DCommon Stock, $.01 par value2003-12-175A03330A38638IBy SonRobert J. Welyki, Attorney-in-fact2003-12-17