0000899171-03-000030 4 1 20030417 20030417 CDW COMPUTER CENTERS INC 0000899171 5961 363310735 IL 1231 4 34 000-21796 03654652 200 N MILWAUKEE AVE VERNON HILLS IL 60061 8474656000 200 N MILWAUKEE AVE VERNON HILLS IL 60061 ROUHSELANG SANDRA M 0001227855 OFFICER 4 1212 BROPHY PARK RIDGE IL 60068 8474656000 1212 BROPHY PARK RIDGE IL 60068 4 1 form_4sr041703.htm SANDY ROUHSELANG APRIL SALE