Investor Inquiries Cindy Klimstra Vice President, Investor Relations 847.968.0268 cklimstra@cdw.com Media Inquiries Gary Ross Sr. Manager, Corporate Communications 847.371.5048 garyross@cdw.com CDW To Host Annual Meeting Of Shareholders VERNON HILLS, Ill. - May 12, 2006 - CDW Corporation (NASDAQ: CDWC), a leading provider of technology products and services to business, government and education, will host its thirteenth annual meeting of shareholders on Wednesday, May 17, 2006 at 5:00 p.m. Central time. The meeting will be held at the company’s Woodland Falls office in Mettawa, Ill. Management’s presentation will be webcast live on the Company’s Web site at www.cdw.com/investor. An audio replay of the presentation will be available approximately two hours after the event and will remain active for approximately two weeks. About CDW CDW® ranked No. 343 on the FORTUNE 500, is a leading provider of technology solutions for business, government and education. CDW is a principal source of technology products and services including top name brands such as Adobe, Apple, Cisco, HP, IBM, Lenovo, Microsoft, Sony, Symantec, and Toshiba. CDW was founded in 1984 and employs approximately 4,350 coworkers. In 2005, the company generated sales of $6.3 billion. CDW's direct model offers one-on-one relationships with knowledgeable account managers; purchasing by telephone, fax, the company's award-winning CDW.com web site, customized CDW@work™ extranets, CDWG.com Web site and macwarehouse.com Web site; custom configured solutions and same day shipping; and pre- and post-sales technical support, with approximately 120 factory-trained and A+ certified technicians on staff.