EXHIBIT 10.3

                   CDW HOLDING CORPORATION STOCK OPTION PLAN
                   -----------------------------------------


                              Section 1.  Purpose
                              -------------------

          The purpose of this CDW Holding Corporation Stock Option Plan is to
foster and promote the long-term financial success of Holding and the Company
and to increase materially stockholder value by (a) motivating superior 
                                                   -                            
performance by participants in the Plan, (b) providing participants in the 
                                          -
Plan with an ownership interest in Holding and (c) enabling the Company to 
                                                - 
attract and retain the services of an outstanding management team upon whose
judgment, interest and special effort the successful conduct of its operations
is largely dependent.


                            Section 2.  Definitions
                            -----------------------

          2.1.  Definitions.  Whenever used herein, the following terms shall 
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have the respective meanings set forth below:

          (a) "Alternative Option" has the meaning given in Section 8.2.

          (b)  "Board" means the Board of Directors of Holding.

          (c)  "C&D Fund" means The Clayton & Dubilier Private Equity Fund IV
     Limited Partnership, a Connecticut limited partnership, and any successor
     investment vehicle managed by Clayton, Dubilier & Rice, Inc.

          (d) "Cause" means (i) the willful failure by the Participant to
                             -                                           
     perform substantially his employment-related duties (other than any such
     failure due to physical or mental illness) after a demand for substantial
     performance is delivered to the Participant by the Board, which notice
     identifies the manner in which the

 
     Participant has not substantially performed his employment-related
     duties, (ii) the Participant's engaging in serious misconduct that is
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     injurious to Holding, the Company or any Subsidiary, (iii) the
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     Participant's having been convicted of, or entered a plea of guilty or nolo
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     contendere to, a crime that constitutes a felony, (iv) the breach by the
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     Participant of any written covenant or agreement with Holding, the Company
     or any Subsidiary not to disclose any information pertaining to Holding,
     the Company or any Subsidiary or not to compete or interfere with Holding,
     the Company or any Subsidiary or (v) the breach by the Participant of his
                                       -                                      
     obligation pursuant to Section 8 of his Management Stock Subscription
     Agreement.

          (e) "Change in Control" means the first to occur of the following
     events after the Effective Date:

               (i)  the acquisition by any person, entity or "group" (as defined
               in Section 13(d) of the Securities Exchange Act of 1934, as
               amended), other than Holding, the Company, the Subsidiaries, any
               employee benefit plan of Holding, the Company or the
               Subsidiaries, or the C&D Fund, of 50% or more of the combined
               voting power of Holding's or the Company's then outstanding
               voting securities;

               (ii)  the merger or consolidation of Holding or the Company, as a
               result of which persons who were stockholders of Holding or the
               Company, as the case may be, immediately prior to such merger or
               consolidation, do not, immediately thereafter, own, directly or
               indirectly, more than 50% of the combined voting power entitled
               to vote generally in the election of directors of the merged or
               consolidated company;

               (iii)  the liquidation or dissolution of Holding or the Company;
               and

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               (iv)  the sale, transfer or other disposition of all or
               substantially all of the assets of Holding or the Company to one
               or more persons or entities that are not, immediately prior to
               such sale, transfer or other disposition, affiliates of Holding
               or the Company.

          (f) "Change in Control Price" means the price per share of Common
     Stock offered in conjunction with any transaction resulting in a Change in
     Control (as determined in good faith by the Board if any part of the
     offered price is payable other than in cash).

          (g) "Committee" means the Compensation Committee of the Board (or such
     other committee of the Board which shall have jurisdiction over the
     compensation of officers).  If at any time no Committee shall be in office,
     the Board shall perform the functions of the Committee.

          (h)  "Common Stock" means the Class A Common Stock, par value $.01 per
     share, of Holding.

          (i)  "Company" means WESCO Distribution, Inc., a Delaware corporation
     formerly named CDW Acquisition Corporation, and any successor thereto.

          (j) "Effective Date" means February 28, 1994.

          (k)  "Employee" means any executive or senior officer or other
     executive or key employee of Holding, the Company or any Subsidiary.

          (l)  "Fair Market Value" means, as of any date, the fair market value
     on such date per share of Common Stock as determined in good faith by the
     Board.  In making a determination of Fair Market Value, the Board shall
     give due consideration for such factors as it deems appropriate, including,
     without limitation, the earnings and certain other financial and operating

                                       3

 
     information of the Company in recent periods, the potential value of the
     Company as a whole, the future prospects of the Company and the industries
     in which it competes, the history and management of the Company, the
     general condition of the securities markets, the fair market value of
     securities of companies engaged in businesses similar to those of the
     Company and a valuation of the Shares, which shall be performed as
     promptly as practicable following the first business day of the 1995 fiscal
     year and each subsequent fiscal year by an independent valuation firm
     chosen by the Board.  The determination of Fair Market Value will not give
     effect to any restrictions on transfer of the Shares or the fact that such
     Shares would represent a minority interest in Holding.

          (m)  "Grant Date" means, with respect to any Option, the date on which
     such Option is granted pursuant to the Plan.

          (n)  "Holding" means CDW Holding Corporation, a Delaware corporation,
     and any successor thereto.

          (o)  "Involuntary Termination" means a termination by the New Employer
     for any reason.

          (p)  "New Employer" means the Participant's employer, or the parent or
     a subsidiary of such employer, immediately following a Change in Control.

          (q)  "Option" means the right granted pursuant to the Plan to purchase
     one share of Common Stock at a price determined in accordance with Section
     6.2.

          (r)  "Option Agreement" means an agreement between Holding and the
     Participant embodying the terms of any Options granted hereunder, which
     agreement shall, unless the Committee otherwise determines, be
     substantially in the form attached hereto as Exhibit A.

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          (s)  "Participant" means any Employee designated by the Committee to
     participate in the Plan.

          (t)  "Permanent Disability" means a physical or mental disability or
     infirmity that prevents the performance of a Participant's employment-
     related duties lasting (or likely to last, based on competent medical
     evidence presented to the Board) for a period of six months or longer.  The
     Board's reasoned and good faith judgment of Permanent Disability shall be
     final and shall be based on such competent medical evidence as shall be
     presented to it by such Participant or by any physician or group of
     physicians or other competent medical expert employed by the Participant or
     the Company to advise the Board.

          (u)  "Plan" means this CDW Holding Corporation Stock Option Plan.

          (v)  "Public Offering" means the first day as of which sales of Common
     Stock are made to the public in the United States pursuant to an
     underwritten public offering of the Common Stock.

          (w)  "Retirement" means a Participant's retirement at or after age 65.

          (x)  "Extraordinary Termination" has the meaning given in Section 7.1.


          (y)  "Subsidiary" means any corporation a majority of whose
     outstanding voting securities is owned, directly or indirectly, by the
     Company or Holding.

          2.2.  Gender and Number.  Except when otherwise indicated by the
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context, words in the masculine gender used in the Plan shall include the
feminine gender, the singular shall include the plural, and the plural shall
include the singular.

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                   Section 3.  Eligibility and Participation
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          Participants in the Plan shall be those Employees selected by the
Committee to participate in the Plan.  The selection of an Employee as a
Participant shall neither entitle such Employee to nor disqualify such Employee
from participation in any other award or incentive plan.


                      Section 4.  Powers of the Committee
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          4.1.  Power to Grant.  The Committee shall determine the Participants
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to whom Options shall be granted and the terms and conditions of any and all
Options granted to Participants, provided that nothing in the Plan shall limit
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the right of members of the Committee who are Employees to receive awards
hereunder.

          4.2.  Administration.  The Committee shall be responsible for the
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administration of the Plan.  Any authority exercised by the Committee under
the Plan shall be exercised by the Committee in its sole discretion.  Subject
to the terms of the Plan, the Committee, by majority action thereof, is
authorized to prescribe, amend and rescind rules and regulations relating to the
administration of the Plan, to provide for conditions and assurances deemed
necessary or advisable to protect the interests of Holding and the Company,
and to make all other determinations necessary or advisable for the
administration and interpretation of the Plan in order to carry out its
provisions and purposes.  Determinations, interpretations or other actions
made or taken by the Committee pursuant to the provisions of the Plan shall be
final, binding and conclusive for all purposes and upon all persons.

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                      Section 5.  Options Subject to Plan
                      -----------------------------------
 
          5.1.  Number.  Subject to the provisions of Sections 5.2 and 5.3, the
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maximum number of Options (and the maximum number of shares of Common Stock
subject to Options) granted under the Plan may not exceed 156,000.  The shares
of Common Stock to be delivered upon the exercise of Options granted under the
Plan may consist, in whole or in part, of treasury Common Stock or authorized
but unissued Common Stock, not reserved for any other purpose.

          5.2.  Cancelled, Terminated or Forfeited Options. Any Option which for
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any reason is cancelled, terminated or otherwise forfeited, in whole or in part,
without having been exercised, shall again be available for grant under the
Plan.

          5.3.  Adjustment in Capitalization.  The number and class of Options
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(and the number of shares of Common Stock available for issuance upon exercise
of such Options) granted under the Plan, and the number, class and exercise
price of any outstanding Options (and the number of shares of Common Stock
subject to outstanding Options), may be adjusted by the Board, in its sole
discretion, if it shall deem such an adjustment to be necessary or appropriate
to reflect any Common Stock dividend, stock split or share combination or any
recapitalization, merger, consolidation, exchange of shares, liquidation or
dissolution of Holding.


                          Section 6.  Terms of Options
                          ----------------------------

          6.1.  Grant of Options.  Options may be granted to Participants at
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such time or times as shall be determined by the Committee.  Each Option granted
to a Participant shall be evidenced by an Option Agreement that shall specify
the exercise price at which a share of Common Stock may be purchased pursuant
to such Option, the duration of such Option and such other terms consistent with
the Plan as the Committee shall determine, including customary
representations,

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warranties and covenants with respect to securities law matters.  Unless
otherwise determined by the Committee at the Grant Date, such Option Agreement
shall also state that the holder thereof is entitled to the benefits of and
bound by the obligations set forth in the Registration and Participation
Agreement, dated as of February 28, 1994, among Holding and certain stockholders
of Holding, to the extent set forth therein.  Such Option Agreement shall,
unless the Committee otherwise determines, be substantially in the form attached
hereto as Exhibit A.

          6.2.  Exercise Price.  The exercise price per share of Common Stock to
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be purchased upon exercise of an Option shall be determined by the Committee but
shall not be less than the Fair Market Value on the Grant Date.
 
          6.3.  Exercise of Options.  Unless otherwise determined by the
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Committee at the Grant Date, 20% of any Options granted to a Participant at any
time shall become exercisable on each of the first five anniversaries of the
Grant Date of such Options, provided that 100% of such Options shall become
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exercisable to the extent provided in Section 8.1 and that the Committee may
accelerate the exercisability of any Option, all Options or any class of
Options, at any time and from time to time.  On or before the date upon which
any Employee will exercise any Option, Holding and such Employee shall enter
into a Management Stock Subscription Agreement substantially in the form
attached hereto as Exhibit B.  Notwithstanding any other provision of the Plan,
each Option shall terminate and shall not be exercisable on or after the tenth
anniversary of the Grant Date of such Option.

          6.4.  Payment.  The Committee shall establish procedures governing the
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exercise of Options, which procedures shall generally require that written
notice of the exercise thereof be given and that the exercise price thereof be
paid in full in cash or cash equivalents, including by personal check, at the
time of exercise.  If so determined by the Committee in its sole discretion at
or after the

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Grant Date, the exercise price of any Options exercised after there has been a
Public Offering may be paid in full or in part in the form of shares of Common
Stock already owned by the Participant, based on the Fair Market Value of such
Common Stock on the date of exercise.  As soon as practicable after receipt of
a written exercise notice and payment in full of the exercise price of any
exercisable Options, Holding shall deliver to the Participant a certificate or
certificates representing the shares of Common Stock acquired upon the exercise
thereof.


                     Section 7.  Termination of Employment
                     -------------------------------------

          7.1.   Extraordinary Termination.  Unless otherwise provided in the
                 -------------------------                                   
Option Agreement or otherwise determined by the Committee at the Grant Date, in
the event that a Participant's employment with Holding, the Company and the
Subsidiaries terminates by reason of the Participant's death, Permanent
Disability or Retirement (each an "Extraordinary Termination") then any Options
held by the Participant and then exercisable shall remain exercisable solely
until the first to occur of (i) the first anniversary of the Participant's
                             -                                             
termination of employment or (ii) the expiration of the term of the Option.  Any
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Options held by the Participant that are not exercisable at the date of the
Extraordinary Termination shall terminate and be cancelled immediately upon such
Extraordinary Termination, and any Options described in the preceding sentence
that are not exercised within the period described in such sentence shall
terminate and be cancelled upon the expiration of such period.

          7.2.  Termination for Cause.  Unless otherwise provided in the Option
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Agreement or otherwise determined by the Committee at or after the Grant Date,
in the event that a Participant's employment with Holding, the Company and the
Subsidiaries is terminated for Cause, any Options held by such Participant
(whether or not then exercisable) shall terminate and be cancelled immediately
upon such termination of employment.

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          7.3.  Other Termination of Employment.  Unless otherwise provided in
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the Option Agreement or otherwise determined by the Committee at or after the
Grant Date, in the event that a Participant's employment with Holding, the
Company and the Subsidiaries terminates for any reason other than (i) an
                                                                   -    
Extraordinary Termination or (ii) for Cause, any Options held by such
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Participant that are exercisable as of the date of such termination shall remain
exercisable for a period of 60 days (or, if shorter, during the remaining term
of the Options). Any Options held by the Participant that are not exercisable at
the date of the Participant's termination of employment shall terminate and be
cancelled immediately upon such termination, and any Options described in the
preceding sentence that are not exercised within the period described in such
sentence shall terminate and be cancelled upon the expiration of such period.

          7.4.   Certain Rights upon Termination of Employment Prior to Public
                 --------------------------------------------------------------
Offering.  Unless otherwise determined by the Committee at the Grant Date, the
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Committee shall provide in each Option Agreement governing Options granted
hereunder that (a) Holding or the Company and the C&D Fund shall have successive
                -                                                               
rights to purchase any exercisable Options from the Participant upon the
termination of his employment prior to a Public Offering and (b) the 
                                                              -         
Participant may require Holding to repurchase his then exercisable Options upon
the termination of the Participant's employment (i) due to an Extraordinary
                                                 -                         
Termination prior to a Public Offering or (ii) by Holding, the Company or any
                                           --                                
Subsidiary other than for Cause prior to a Public Offering, in each case for a
purchase price per Option equal to the excess, if any, of (x) the Fair Market
                                                           -                 
Value on the date of termination over (y) the exercise price per share of Common
                                       -                                        
Stock pursuant to such Options, and upon such additional terms and conditions as
are set forth in Section 4 of the Option Agreement attached hereto as Exhibit A.
The foregoing right of a Participant to require Holding to repurchase any
exercisable Options shall be subject to the Company having the ability to do so
under the terms of its financing arrangements and under Delaware law.

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                         Section 8.  Change in Control
                         -----------------------------

          8.1.   Accelerated Vesting and Payment.  Unless the Committee shall
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otherwise determine in the manner set forth in Section 8.2, in the event of a
Change in Control, each Option shall be cancelled in exchange for a payment in
cash of an amount equal to the excess, if any, of the Change in Control Price
over the exercise price for such Option.

          8.2.   Alternative Options.  Notwithstanding Section 8.1, no
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cancellation, acceleration of exercisability, vesting or cash settlement or
other payment shall occur with respect to any Option if the Committee reasonably
determines in good faith, prior to the occurrence of a Change in Control, that
such Option shall be honored or assumed, or new rights substituted therefor
(such honored, assumed or substituted Option being hereinafter referred to as
an "Alternative Option") by the New Employer, provided that any such
                                              --------  
Alternative Option must:

          (a) provide the Participant that held such Option with rights and
     entitlements substantially equivalent to or better than the rights, terms
     and conditions applicable under such Option, including, but not limited to,
     an identical or better exercise and vesting schedule, identical or better
     timing and methods of payment and, if the Alternative Options or the
     securities underlying them are not publicly traded, identical or better
     rights to require Holding or the New Employer to repurchase the Alternative
     Options;

          (b)  have substantially equivalent economic value to such Option
     (determined at the time of the Change in Control); and

          (c)  have terms and conditions which provide that in the event that
     such Participant suffers an Involuntary Termination within two years
     following a Change in Control:

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               (i)  any conditions on such Participant's rights under, or any
          restrictions on transfer or exercisability applicable to, each such
          Alternative Option shall be waived or shall lapse, as the case may
          be; or

               (ii)  such Participant shall have the right to surrender such
          Alternative Option within 30 days following such termination in
          exchange for a payment in cash equal to the excess of the Fair Market
          Value of the equity security subject to the Alternative Option over
          the price, if any, that such Participant would be required to pay to
          exercise such Alternative Option.


                    Section 9.  Amendment, Modification, and
                    ----------------------------------------
                            Termination of the Plan
                            -----------------------

          The Board at any time may terminate or suspend the Plan, and from time
to time may amend or modify the Plan. No amendment, modification, termination or
suspension of the Plan shall in any manner adversely affect any Option
theretofore granted under the Plan, without the consent of the Participant
holding such Option. Shareholder approval of any such amendment, modification,
termination or suspension shall be obtained to the extent mandated by applicable
law, or if otherwise deemed appropriate by the Committee.


                    Section 10.  Miscellaneous Provisions
                    -------------------------------------
                                        
          10.1.  Nontransferability of Awards.  No Options granted under the
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Plan may be sold, transferred, pledged, assigned, encumbered or otherwise
alienated or hypothecated, other than by will or by the laws of descent and
distribution and provided that the deceased Participant's beneficiary or the
representative of his estate acknowledges and agrees in writing, in a form
reasonably acceptable to Holding, to be bound by the provisions of the Plan
(including

                                       12

 
the purchase rights described in Section 7.4) and the Option Agreement covering
such Options as if such beneficiary or estate were the Participant.  All rights
with respect to Options granted to a Participant under the Plan shall be
exercisable during his life-time by such Participant only. Following a
Participant's death, all rights with respect to Options that were exercisable at
the time of such Participant's death and have not terminated shall be
exercised by his designated beneficiary or by his estate.
 
          10.2.  Beneficiary Designation.  Each Participant under the Plan may
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from time to time name any beneficiary or beneficiaries (who may be named
contingently or successively) by whom any right under the Plan is to be
exercised in case of his death.  Each designation will revoke all prior
designations by the same Participant, shall be in a form reasonably prescribed
by the Committee, and will be effective only when filed by the Participant in
writing with the Committee during his lifetime.
 
          10.3.  No Guarantee of Employment or Participation.  Nothing in the
                 -------------------------------------------
Plan or in any Option Agreement shall interfere with or limit in any way the
right of Holding, the Company or any Subsidiary to terminate any Participant's
employment at any time, or confer upon any Participant any right to continue in
the employ of Holding, the Company or any Subsidiary.  No Employee shall have a
right to be selected as a Participant or, having been so selected, to receive
any Options.

          10.4.  Tax Withholding.  The Company or the Subsidiary employing a
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Participant shall have the power to withhold, or to require such Participant to
remit to the Company or such Subsidiary, subject to such other arrangements as
the Committee may set forth in the Option Agreement to which such Participant is
a party, an amount sufficient to satisfy all federal, state, local and foreign
withholding tax requirements in respect of any Option granted under the Plan.
 

                                       13

 
          10.5.  Indemnification.  Each person who is or shall have been a
                 ---------------                                          
member of the Committee, the Board or any other committee of the Board shall be
indemnified and held harmless by the Company and Holding to the fullest extent
permitted by law from and against any and all losses, costs, liabilities and
expenses (including any related attorneys' fees and advances thereof) in
connection with, based upon or arising or resulting from any claim, action, suit
or proceeding to which he may be made a party or in which he may be involved
by reason of any action taken or failure to act under or in connection with the
Plan and from and against any and all amounts paid by him in settlement thereof,
with the Company's approval, or paid by him in satisfaction of any judgment in
any such action, suit or proceeding against him, provided that he shall give the
                                                 --------                       
Company an opportunity, at its own expense, to defend the same before he
undertakes to defend it on his own behalf.  The foregoing right of
indemnification shall not be exclusive and shall be independent of any other
rights of indemnification to which such persons may be entitled under Holding's
or the Company's Certificate of Incorporation or By-laws, by contract, as a
matter of law, or otherwise.

          10.6.  No Limitation on Compensation.  Nothing in the Plan shall be
                 -----------------------------                               
construed to limit the right of Holding, the Company or any Subsidiary to
establish other plans or to pay compensation to its employees, in cash or
property, in a manner that is not expressly authorized under the Plan.

          10.7.  Requirements of Law.  The granting of Options and the issuance
                 -------------------                                           
of shares of Common Stock pursuant to such Options shall be subject to all
applicable laws, rules and regulations, and to such approvals by any
governmental agencies or national securities exchanges as may be required. No
Options shall be granted under the Plan, and no shares of Common Stock shall be
issued upon exercise of any Options granted under the Plan, if such grant or
exercise would result in a violation of applicable law, including the federal
securities laws and any applicable state securities laws.

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          10.8.  Freedom of Action.  Subject to Section 9, nothing in the Plan
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or any Option Agreement shall be construed as limiting or preventing Holding,
the Company or any Subsidiary from taking any action that it deems appropriate
or in its best interest.

          10.9.  Term of Plan.  The Plan shall be effective as of the Effective
                 ------------                                                  
Date.  The Plan shall continue in effect, unless sooner terminated pursuant to
Section 9, until the tenth anniversary of the Effective Date.  The provisions of
the Plan, however, shall continue thereafter to govern all outstanding Options
theretofore granted.

          10.10.  No Voting Rights.  Except as otherwise required by law, no
                  ----------------                                          
Participant holding any Options granted under the Plan shall have any right, in
respect of such Options, to vote on any matter submitted to Holding's
stockholders until such time as the shares of Common Stock issuable upon
exercise of such Options have been so issued.

          10.11.  Governing Law.  The Plan, and all agreements hereunder, shall
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be construed in accordance with and governed by the laws of the State of New
York, except to the extent that the corporate law of the State of Delaware
specifically and mandatorily applies.

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