Exhibit 99.1

    Statement Under Oath of a Principal Executive Officer Regarding Facts and
                 Circumstances Relating to Exchange Act Filings

I, John A. Edwardson, state and attest that:

     (1) To the best of my knowledge, based upon a review of the covered reports
of CDW Computer Centers, Inc. ("CDW"), and, except as corrected or supplemented
in a subsequent covered report:

     .    no covered report contained an untrue statement of a material fact as
          of the end of the period covered by such report (or in the case of a
          report on Form 8-K or definitive proxy materials, as of the date on
          which it was filed); and

     .    no covered report omitted to state a material fact necessary to make
          the statements in the covered report, in light of the circumstances
          under which they were made, not misleading as of the end of the period
          covered by such report (or in the case of a report on Form 8-K or
          definitive proxy materials, as of the date on which it was filed).

     (2) I have reviewed the contents of this statement with CDW's audit
committee.

     (3) In this statement under oath, each of the following, if filed on or
before the date of this statement, is a "covered report":

     .    Annual Report on Form 10-K for the year ended December 31, 2001 of
          CDW;

     .    all reports on Form 10-Q, all reports on Form 8-K and all definitive
          proxy materials of CDW filed with the Commission subsequent to the
          filing of the Form 10-K identified above; and

     .    any amendments to any of the foregoing.



                                           Subscribed and sworn to
                                           before me this 13th day of
/s/ John A. Edwardson                      August, 2002.
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John A. Edwardson
August 13, 2002                            /s/ Becky A. Watson
                                           -------------------
                                           Notary Public

                                           My Commission Expires: June 14, 2004