<SUBMISSION>
<ACCESSION-NUMBER>0001181431-07-038955
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20070529
<FILING-DATE>20070608
<DATE-OF-FILING-DATE-CHANGE>20070608
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>CDW CORP
<CIK>0000899171
<ASSIGNED-SIC>5961
<IRS-NUMBER>363310735
<STATE-OF-INCORPORATION>IL
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>200 N MILWAUKEE AVE
<CITY>VERNON HILLS
<STATE>IL
<ZIP>60061
<PHONE>8474656000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>200 N MILWAUKEE AVE
<CITY>VERNON HILLS
<STATE>IL
<ZIP>60061
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>CDW COMPUTER CENTERS INC
<DATE-CHANGED>19930322
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>VH MergerSub, Inc.
<CIK>0001402058
<STATE-OF-INCORPORATION>IL
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-21796
<FILM-NUMBER>07910143
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>C/O MADISON DEARBORN PARTNERS, LLC
<STREET2>THREE FIRST NATIONAL PLAZA
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
<PHONE>312 895-1000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O MADISON DEARBORN PARTNERS, LLC
<STREET2>THREE FIRST NATIONAL PLAZA
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>VH Holdings, Inc.
<CIK>0001402057
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-21796
<FILM-NUMBER>07910144
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>C/O MADISON DEARBORN PARTNERS, LLC
<STREET2>THREE FIRST NATIONAL PLAZA
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
<PHONE>312 895-1000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O MADISON DEARBORN PARTNERS, LLC
<STREET2>THREE FIRST NATIONAL PLAZA
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>MADISON DEARBORN PARTNERS LLC
<CIK>0001181100
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-21796
<FILM-NUMBER>07910145
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>THREE FIRST NATIONAL PLAZA STE 3800
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
<PHONE>3128951000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>THREE FIRST NATIOANL PLAZA STE 3800
<CITY>CHICAGO
<STATE>IL
<ZIP>60602
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>rrd162279.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-05-29</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000899171</issuerCik>
        <issuerName>CDW CORP</issuerName>
        <issuerTradingSymbol>CDWC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001181100</rptOwnerCik>
            <rptOwnerName>MADISON DEARBORN PARTNERS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THREE FIRST NATIONAL PLAZA, SUITE 3800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60602</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <otherText>See Remarks (2)</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001402057</rptOwnerCik>
            <rptOwnerName>VH Holdings, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THREE FIRST NATIONAL PLAZA, SUITE 3800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60602</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Remarks (1)</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001402058</rptOwnerCik>
            <rptOwnerName>VH MergerSub, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THREE FIRST NATIONAL PLAZA, SUITE 3800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60602</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Beneficial owner</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>No securities are benefically owned.</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">VH Holdings, Inc. and VH MergerSub, Inc. are parties to that certain Support Agreement, dated as of May 29, 2007 (the &quot;Support Agreement&quot;), with each of Michael P. Krasny Revocable Trust U/A/D July 1, 1993, Circle of Service Foundation, Inc., MPK-DT 2005 GRAT I, MPK-DT 2006 GRAT II, MPK DT 2006 GRAT III, MPK 2006 GRAT I, MPK 2006 GRAT II, MPK-DT 2006 GRAT I (the &quot;Stockholders&quot;).  Pursuant to the Support Agreement, the Stockholders have agreed, among other things, to vote their shares of Common Stock in favor of the transactions contemplated by that certain Agreement and Plan of Merger among VH Holdings, Inc., VH MergerSub, Inc. and the Issuer dated as of May 29, 2007.  As a result of entering into the Support Agreement, VH Holdings, Inc. and VH MergerSub, Inc. may be deemed beneficial owners of the shares of Common Stock subject to the Support Agreement.(Continued on foot note 2)</footnote>
        <footnote id="F2">Madison Dearborn Partners, LLC, as the entity at whose direction VH Holdings, Inc. and VH MergerSub, Inc. were formed, may also be deemed beneficial owner of the shares of Common Stock subject to the Support Agreement.  None of the Reporting Persons has any pecuniary interest in any of the shares of Common Stock subject to the Support Agreement, and each expressly disclaims beneficial ownership of such shares for all purposes.</footnote>
    </footnotes>

    <remarks>(1) Entity at whose direction VH Holdings, Inc. and VH MergerSub, Inc. were formed.



(2)Sole shareholder of VH MergerSub, Inc.</remarks>

    <ownerSignature>
        <signatureName>/s/ VH MergerSub, Inc. by Benjamin D. Chereskin,  its President and Assistant Secretary</signatureName>
        <signatureDate>2007-06-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ VH Holdings, Inc. by Benjamin D. Chereskin, its President and Assistant Secretary</signatureName>
        <signatureDate>2007-06-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Madison Dearborn Partners, LLC by Mark B. Tresnowski, its Managing Director and General Counsel</signatureName>
        <signatureDate>2007-06-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
