EXCHANGE AGREEMENT


This Exchange Agreement (this "Agreement"), dated as of May 13, 1999, is entered
into by and among Homebase Work Solutions Ltd., on behalf of each of the parties
set out on Schedule "A" attached  hereto (each such person or entity is referred
to herein as a  "Shareholder"  and such  individuals or entities are referred to
herein  collectively as the  "Shareholders"),  InfoCast Canada  Corporation,  an
Ontario  corporation  (the  "Corporation")  and InfoCast  Corporation,  a Nevada
corporation ("InfoCast");

                                   WITNESSETH:

WHEREAS  pursuant  to  a  share  purchase   agreement  and  related  letters  of
transmittal contemplated thereby (collectively,  the "Purchase Agreement") dated
as of the 13th day of May, 1999 by and among the  Shareholders,  the Corporation
and  InfoCast,  the  parties  agreed that they would  execute  and deliver  this
Exchange Agreement;

AND  WHEREAS  pursuant  to the  Purchase  Agreement,  as  consideration  for the
purchase  of all of the issued  and  outstanding  securities  of  Homebase  Work
Solutions  Ltd., the Corporation  issued  3,400,000  exchangeable  shares of the
Corporation  (each an "Exchangeable  Share" and  collectively the  "Exchangeable
Shares");

AND  WHEREAS the  articles of  incorporation  of the  Corporation  set forth the
rights, privileges, restrictions and conditions (collectively, the "Exchangeable
Share Provisions") attaching to the Exchangeable Shares;

AND WHEREAS InfoCast is the registered and beneficial owner of 10,000,000 common
shares of the Corporation, being all OF THE issued and outstanding common shares
of the Corporation as of the date hereof;

AND  WHEREAS  the  Shareholders  are the  registered  and  beneficial  owners of
3,400,000 Exchangeable Shares;

AND WHEREAS  Homebase  has full power and  authority to execute and deliver this
Agreement by and on behalf of each of the Shareholders;

AND WHEREAS the Shareholders have agreed to grant InfoCast the right to purchase
the  Exchangeable  Shares on the terms and  subject  to the  conditions  set out
herein;

NOW  THEREFORE  in  consideration  of the  premises  and mutual  agreements  and
covenants herein  contained (the receipt and adequacy of which  consideration as
to each of the parties  hereto are hereby  mutually  acknowledged),  the parties
hereto hereby covenant and agree as follows:





                                    ARTICLE 1
                         DEFINITIONS AND INTERPRETATION

1.1 Defined Terms. All capitalized  terms used in this Agreement  shall,  unless
otherwise  defined herein,  have the meanings given to them in the  Exchangeable
Share  Provisions.  In addition,  the  following  terms shall have the following
meanings:

"Automatic  Exchange  Right" means the benefit of the  obligation of InfoCast to
effect the automatic exchange of Exchangeable  Shares for InfoCast Common Shares
pursuant to section 2.10.

"Insolvency Event" means the institution by the Corporation of any proceeding to
be  adjudicated  a bankrupt or  insolvent or to be dissolved or wound up, or the
consent  of  the  Corporation  to the  institution  of  bankruptcy,  insolvency,
dissolution,  restructuring or winding up proceedings  against it, or the filing
of a petition,  answer or consent  seeking  dissolution  or winding up under any
bankruptcy,  insolvency or analogous  laws,  including  without  limitation  the
Companies Creditors'  Arrangement Act (Canada) and the Bankruptcy and Insolvency
Act (Canada),  and the failure by the  Corporation  to contest in good faith any
such  proceedings  commenced  in  respect of the  Corporation  within 15 days of
becoming aware thereof,  or the consent by the  Corporation to the filing of any
such  petition  or to  the  appointment  of a  receiver,  or the  making  by the
Corporation  of a  general  assignment  for the  benefit  of  creditors,  or the
admission  in  writing  by the  Corporation  of its  inability  to pay its debts
generally as they become due, or the Corporation not being  permitted,  pursuant
to solvency  requirements  of  applicable  law, to redeem any  Retracted  Shares
pursuant to Section 5.1 of the Exchangeable Share Provisions.

1.2 Interpretation not Affected by Headings, etc. The division of this Agreement
into  articles,  sections and  paragraphs  and the insertion of headings are for
convenience  of  reference  only  and  shall  not  affect  the  construction  or
interpretation of this Agreement.

1.3 Number,  Gender, etc. Words importing the singular number only shall include
the plural and vice versa.  Words  importing the use of any gender shall include
all genders.

1.4 Date for any Action. In the event that any date on or by which any action as
required or  permitted to be taken under this  Agreement is not a Business  Day,
such  action  shall  be  required  or  permitted  to be  taken on or by the next
succeeding  Business Day. For the purposes of this  Agreement,  a "Business Day"
means any day other than a Saturday, Sunday or a day when banks are not open for
business in either or both of New York, New York or Toronto, Ontario.
                                       -2-


                                    ARTICLE 2
                      EXCHANGE RIGHT AND AUTOMATIC EXCHANGE

2.1      Grant and Ownership of the Exchange  Right.  InfoCast  hereby grants to
the  Shareholders,  subject  to the  provisions  of  applicable  law  (including
applicable  securities  laws),  the  right  (the  "Exchange  Right"),  upon  the
occurrence and during the continuance of an Insolvency Event or in the case of a
Triggering  Event (such term having the meaning  ascribed thereto in Section 3.3
hereof),  to require  InfoCast to purchase from each or any  Shareholder all but
not less than all of the Exchangeable  Shares held by the Shareholder and hereby
grants to the Shareholders the Automatic  Exchange Right, all in accordance with
the provisions of this Agreement.

2.2      Legended  Share   Certificates.   The   Corporation   will  cause  each
certificate representing the Exchangeable Shares to bear a legend as follows:

         The shares represented by this Certificate:

(i)      are subject to the terms and  conditions of an Exchange  Agreement (the
         "Agreement")  and  Support  Agreement,  both of which are dated May 13,
         1999,  and are  between the  Corporation,  InfoCast  and various  other
         parties;

(ii)     provide the holder with an Exchange Right and Automatic Exchange Right,
         as defined in the Agreement  (collectively the "Rights"),  which Rights
         may be exercised in accordance with the Agreement;

(iii)    have been  issued  pursuant to  exemptions  from the  registration  and
         prospectus  requirements  of each of the  Securities  Act (Ontario) and
         Securities   Act  (Alberta)   and  are  therefore   subject  to  resale
         restrictions; and

(iv)     have not been registered  under the Securities Act of 1933, as amended,
         and may not be resold or otherwise  transferred  unless they are either
         registered under said Act or sold or otherwise  transferred pursuant to
         an exemption from such registration requirements.

2.3 Purchase Price. The purchase price payable by InfoCast for each Exchangeable
Share to be  purchased  by InfoCast  under the  Exchange  Right shall be one (1)
InfoCast  Common Share plus that  additional  consideration  set out below.  The
purchase of such Exchangeable Share may be satisfied only by InfoCast delivering
to the relevant  Shareholder  that number of InfoCast Common Shares equal to the
number of Exchangeable  Shares so purchased plus (i) an additional  amount equal
to the full amount of all cash  dividends  declared,  payable and unpaid on such
Exchangeable Share and all undeclared but payable cash dividends payable on such
Exchangeable  Share,  plus  (ii) an  additional  amount  equal to all  dividends
declared and paid on the InfoCast  Common Stock which have not been  declared on
the Exchangeable  Shares in accordance  herewith or with the Exchangeable  Share
Provisions,  plus (iii) an additional amount representing any non-cash dividends
declared,   payable  and  unpaid  on  such   Exchangeable   Share   ("Additional
Consideration"). In connection with the foregoing,  notwithstanding the terms of
the Exchangeable Share Provisions, InfoCast hereby waives

                                       -3-


its right to participate pari passu with the Exchangeable Shares with respect to
the  payment of  dividends  and the  distribution  of assets in the event of the
liquidation,  dissolution or wind-up of the  Corporation,  whether  voluntary or
involuntary,  or any other  distribution of the assets of the Corporation  among
its  shareholders  for  the  purpose  of  winding-up  its  affairs,  and  hereby
irrevocably  acknowledges  and agrees that the  Exchangeable  Shares held by the
Shareholders  shall be entitled to a preference  over the Common  Shares and any
other  shares  ranking  junior to the  Exchangeable  Shares with  respect to the
payment  of  dividends  and the  distribution  of  assets  in the  event  of the
liquidation,  dissolution or winding-up of the Corporation, whether voluntary or
involuntary,  or any other distribution of the assets of the Corporation,  among
its  shareholders  for kite purpose of  winding-up  its affairs.  The  foregoing
priority  shall also apply  between the parties with respect to any  Liquidation
Amount, Redemption Price and Retraction Price, notwithstanding any provisions in
the Exchangeable Share Provisions to the contrary.

2.4 Exercise Instructions. Subject to the terms and conditions herein set forth,
a Shareholder shall be entitled,  upon the occurrence and during the continuance
of an Insolvency Event or Triggering  Event, to exercise the Exchange Right with
respect to all but not less than all of the  Exchangeable  Shares  registered in
the  name of such  Shareholder  on the  books  of the  Corporation,  subject  to
applicable  securities  laws. To exercise the Exchange  Right,  the  Shareholder
shall  deliver to  InfoCast in person,  by courier  service or by  certified  or
registered  mail, the certificates  representing all of the Exchangeable  Shares
registered  in the  name  of such  Shareholder,  duly  endorsed  in  blank,  and
accompanied by such other documents and instruments as may be required to effect
a transfer of Exchangeable Shares under the Business  Corporations Act (Ontario)
and the by-laws of the Corporation and such additional documents and instruments
as InfoCast may reasonably require (including evidence  reasonably  satisfactory
to InfoCast  that the holder of  Exchangeable  Shares is not a  non-resident  of
Canada  within the  meaning of the  Income  Tax Act  (Canada)  or a Section 1 16
certificate with a certificate  limit in the payment amount) together with (a) a
duly  completed form of notice of exercise of the Exchange  Right,  contained on
the reverse of or attached to the Exchangeable Share  certificates,  stating (i)
that the  Shareholder  thereby  exercises  the  Exchange  Right so as to require
InfoCast to purchase from the  Shareholder  the  Exchangeable  Shares  specified
therein,  (ii)  that  such  Shareholder  has  good  title  to and  owns all such
Exchangeable  Shares to be  acquired  by  InfoCast  free and clear of all liens,
claims and encumbrances,  (iii) the names in which the certificates representing
InfoCast  Common  Shares  deliverable  in  connection  with the  exercise of the
Exchange  Right are to be issued and (iv) the names and addresses of the persons
to whom such new  certificates  should be delivered and (b) payment (or evidence
satisfactory  to the  Corporation and InfoCast of payment) of the taxes (if any)
payable as contemplated by section 2.7 of this Agreement.

2.5  Delivery of InfoCast  Common  Shares;  Effect of Exercise.  Promptly  after
receipt  of  the  certificates  representing  all  of  the  Exchangeable  Shares
registered  in the name of the  Shareholder  together  with such  documents  and
instruments  of transfer and a duly  completed form of notice of exercise of the
Exchange  Right (and  payment  of taxes,  if any,  or  evidence  thereto),  duly
endorsed

                                       -4-



for transfer to InfoCast,  InfoCast shall as soon as practicable thereafter, and
in any event within four business days,  deliver to the  Shareholder (or to such
other  persons,   if  any,  properly   designated  by  such  Shareholder),   the
certificates for the number of InfoCast Common Shares  deliverable in connection
with the  exercise of the Exchange  Right,  which shares shall be duly issued as
fully  paid  and   non-assessable  and  free  and  clear  of  any  lien,  claim,
encumbrance,  security  interest or adverse  claim (other any such lien,  claim,
encumbrance,  security  interest  or  adverse  claim  arising as a result of any
action or inaction by a Shareholder), and the Additional Consideration,  if any,
the closing of the transaction of purchase and sale contemplated by the Exchange
Right  shall be deemed to have  occurred,  and the  holder of such  Exchangeable
Shares shall be deemed to have  transferred to InfoCast all of its right,  title
and interest in and to such  Exchangeable  Shares and shall cease to be a holder
of such  Exchangeable  Shares and shall not be entitled  to exercise  any of the
rights of a holder in  respect  thereof,  other  than the right to  receive  his
proportionate  part of the total purchase price  therefor,  unless the requisite
number of  InfoCast  Common  Shares is not  allotted,  issued and  delivered  by
InfoCast  to  such  Shareholder  (or to such  other  persons,  if any,  properly
designated  by such  Shareholder),  within  twenty  Business Days of the date of
exercise,  in which case the rights of the Shareholder  shall remain  unaffected
until such  InfoCast  Common  Shares are so  allotted,  issued and  delivered by
InfoCast.  Concurrently  with  such  Shareholder  ceasing  to  be  a  holder  of
Exchangeable  Shares,  the  Shareholder  shall be considered  and deemed for all
purposes  to be the holder of  InfoCast  Common  Shares to which it is  entitled
pursuant to the Exchange Right.

2.6 Exercise of Exchange  Right  Subsequent to  Retraction.  In the event that a
Shareholder  has exercised its right under Article 5 of the  Exchangeable  Share
Provisions to require the  Corporation to redeem any or all of the  Exchangeable
Shares held by the Shareholder  (the  "Retracted  Shares") and provided that the
Shareholder has not revoked the Retraction  Request delivered by the Shareholder
to the Corporation pursuant to Section 5.1 of the Exchangeable Share Provisions,
the  Corporation  hereby agrees with the  Shareholder  to forward or cause to be
forwarded within 2 business days to InfoCast all relevant materials delivered by
the Shareholder to the Corporation  (including  without limitation a copy of the
Retraction  Request delivered  pursuant to Section 5.1 of the Exchangeable Share
Provisions) in connection with such proposed  redemption of the Retracted Shares
and,  subject  to  the  provisions  of  applicable  law  (including   applicable
securities  laws) and the  Retraction  Call Right,  InfoCast  will purchase such
shares in accordance with the provisions of this Article 2.

2.7  Stamp or Other  Transfer  Taxes.  Upon any sale of  Exchangeable  Shares to
InfoCast  pursuant to the Exchange  Right,  the Automatic  Exchange  Right,  the
Redemption Call Right, the Liquidation Call Right and the Retraction Call Right,
the share certificate or certificates  representing InfoCast Common Shares to be
delivered in connection  with the payment of the total  purchase  price therefor
shall be issued in the name of the  Shareholder  of the  Exchangeable  Shares so
sold or in such name as such Shareholder may otherwise direct in writing without
charge to the holder of the Exchangeable Shares so sold; provided, however, that
such Shareholder (a) shall pay (and neither  InfoCast nor the Corporation  shall
be required to pay) any documentary stamp, transfer or other

                                       -5-



taxes that may be payable in respect of any transfer involved in the issuance or
delivery of such  shares to a person  other than such  Shareholder  or (b) shall
have  established to the  satisfaction of InfoCast and the Corporation that such
taxes, if any, have been paid.

2.8 Notice of Insolvency  Event and  Triggering  Event.  As soon as  practicably
possible upon the  occurrence of a Triggering  Event or Insolvency  Event or any
event which with the giving of notice or the passage of time or both would be an
Insolvency  Event or Triggering  Event,  the Corporation and InfoCast shall give
written  notice thereof to the  Shareholder,  which notice shall include a brief
description of the Exchange Right.

2.9 Reservation of InfoCast Common Shares. InfoCast hereby represents,  warrants
and  covenants  that it has  irrevocably  reserved  for issuance and will at all
times keep  available,  out of its authorized and unissued  capital stock,  such
number of InfoCast  Common  Shares  equal to the number of  Exchangeable  Shares
issued  and  outstanding  from  time to time and  InfoCast  further  represents,
warrants  and  covenants  that such number of InfoCast  Common  Shares  shall be
issuable free and clear of any lien,  claim,  encumbrance,  security interest or
adverse claim (other any such lien,  claim,  encumbrance,  security  interest or
adverse  claim  arising as a result of any action or inaction by a  Shareholder)
notwithstanding  that the issuance of such InfoCast  Common Shares may give rise
to certain rights of third parties against  InfoCast  pursuant to pre-emptive or
other rights granted by InfoCast to such third parties.

2.10     Automatic Exchange on Liquidation of InfoCast.

(a)      InfoCast will give each  Shareholder  notice (in the identical form and
         at the same time given by InfoCast to its  stockholders) of each of the
         following events at the time set forth below:

         (i)      in the event of any determination by the Board of Directors of
                  InfoCast to institute  voluntary  liquidation,  dissolution or
                  winding up  proceedings  with respect to InfoCast or to effect
                  any  other  distribution  of  assets  of  InfoCast  among  its
                  shareholders  for the  purpose of  winding  up its  affairs at
                  least 30 days  prior to the  proposed  effective  date of such
                  liquidation,  dissolution,  winding-up or other  distribution;
                  and

         (ii)     immediately, upon receipt by InfoCast of notice of or InfoCast
                  otherwise  becoming  aware  of any  threatened  or  instituted
                  claim, suit, petition or other proceedings with respect to the
                  involuntary liquidation, dissolution or winding-up of InfoCast
                  or to effect  any  other  distribution  of assets of  InfoCast
                  among its  shareholders  for the  purpose  of  winding  up its
                  affairs;

(any such event being hereinafter referred to as a "Liquidation Event").

                                       -6-



         (b)      In order that the Shareholders  will be able to participate on
                  a pro rata basis with the holders of InfoCast Common Shares in
                  the  distribution  of assets of InfoCast in connection  with a
                  Liquidation  Event,  on the  fifth  Business  Day prior to the
                  effective date (the  "Liquidation  Event Effective Date") of a
                  Liquidation  Event  all of the then  outstanding  Exchangeable
                  Shares shall be  automatically  exchanged for InfoCast  Common
                  Shares, subject to the provisions of applicable law (including
                  applicable securities law). To effect such automatic exchange,
                  InfoCast shall purchase each Exchangeable Share outstanding as
                  soon as practicable  prior to the Liquidation  Event Effective
                  Date and held by a  Shareholder,  and each  Shareholder  shall
                  sell the  Exchangeable  Shares held by it at such time,  for a
                  purchase  price per  Exchangeable  Share equal to one InfoCast
                  Common Share plus the Additional

Consideration,  if any, which shall be satisfied in full by InfoCast  delivering
to the Shareholder  such number of InfoCast Common Shares equal to the number of
Exchangeable Shares so purchased plus the Additional Consideration, if any.

         (c)      The  closing  of  the   transaction   of  purchase   and  sale
                  contemplated by the automatic exchange of Exchangeable  Shares
                  for InfoCast  Common Shares shall be deemed to have  occurred,
                  and each  Shareholder  shall be deemed to have  transferred to
                  InfoCast all of the Shareholder's right, title and interest in
                  and to its Exchangeable  Shares and shall cease to be a holder
                  of such  Exchangeable  Shares upon InfoCast  delivering to the
                  Shareholder   InfoCast  Common  Shares  deliverable  upon  the
                  automatic exchange of Exchangeable  Shares for InfoCast Common
                  Shares and the Additional Consideration,  if any. Concurrently
                  with such  Shareholder  ceasing to be a holder of Exchangeable
                  Shares, the Shareholder shall be considered and deemed for all
                  purposes to be the holder of InfoCast  Common Shares issued to
                  it pursuant to the automatic  exchange of Exchangeable  Shares
                  for InfoCast  Common Shares and the  certificates  held by the
                  Shareholder  previously  representing the Exchangeable  Shares
                  exchanged by the  Shareholder  with InfoCast  pursuant to such
                  automatic  exchange  shall  thereafter  be deemed to represent
                  InfoCast  Common  Shares   delivered  to  the  Shareholder  by
                  InfoCast pursuant to such automatic exchange. Upon the request
                  of a  Shareholder  and the  surrender  by the  Shareholder  of
                  Exchangeable Share  certificates  deemed to represent InfoCast
                  Common Shares,  duly endorsed in blank and accompanied by such
                  instruments  of transfer as InfoCast may  reasonably  require,
                  InfoCast  shall  deliver  to  the   Shareholder   certificates
                  representing  InfoCast  Common Shares of which the Shareholder
                  is the holder.

                                       -7-


                                    ARTICLE 3
                           CERTAIN RIGHTS OF INFOCAST
                         TO ACQUIRE EXCHANGEABLE SHARES


3.1      InfoCast Liquidation Call Right.

(a)      Upon the occurrence and during the continuation of an Insolvency Event,
         InfoCast  shall  have  the  overriding  right  (the  "Liquidation  Call
         Right"), in the event of and notwithstanding the proposed  liquidation,
         dissolution or winding-up of the  Corporation  pursuant to Article 4 of
         the  Exchangeable  Share  Provisions  to purchase from all but not less
         than all of the holders of Exchangeable  Shares on the Liquidation Date
         (as defined in the Exchangeable Share Provisions) all but not less than
         all of the  Exchangeable  Shares held by each such holder on payment by
         InfoCast  of an amount per  Exchangeable  Share  equal to one  InfoCast
         Common Share plus the Additional Consideration per share, if any, which
         shall be satisfied in full by  delivering  to each such holder for each
         Exchangeable  Share an equivalent number of InfoCast Common Shares plus
         the Additional  Consideration per share, if any, (the "Liquidation Call
         Purchase Price"), provided that if the record date for any declared and
         unpaid  dividends  occurs  on  or  after  the  Liquidation   Date,  the
         Liquidation  Call  Purchase  Price  shall not include  such  additional
         amount  equivalent to such  dividends.  In the event of the exercise of
         the Liquidation Call Right by InfoCast,  each holder shall be obligated
         to sell all the  Exchangeable  Shares held by the holder to InfoCast on
         the  Liquidation  Date on  payment  by  InfoCast  to the  holder of the
         Liquidation Call Purchase Price for each such Exchangeable Share.

(b)      To  exercise  the  Liquidation  Call  Right,  InfoCast  must notify the
         Corporation  as  agent  for  the  holders  of  Exchangeable  Shares  of
         InfoCast's intention to exercise such right at least 30 days before the
         Liquidation Date in the case of a voluntary liquidation, dissolution or
         winding up of the  Corporation  and at least five  Business Days before
         the  Liquidation  Date  in  the  case  of an  involuntary  liquidation,
         dissolution or winding up of the Corporation;  provided,  however, that
         if it is  impractical  for  InfoCast to give such  notice,  such lesser
         amount of notice as practicable  shall be given.  The Corporation  will
         notify the holders of Exchangeable Shares as to whether or not InfoCast
         has exercised the Liquidation  Call Right forthwith after the expiry of
         the period  during  which the same may be  exercised  by  InfoCast.  If
         InfoCast  exercises the Liquidation Call Right, on the Liquidation Date
         InfoCast   will   purchase  and  the  holders  will  sell  all  of  the
         Exchangeable Shares then outstanding for a price per Exchangeable Share
         equal to the Liquidation Call Purchase Price.

(c)      For the purposes of completing the purchase of the Exchangeable  Shares
         pursuant to the Liquidation Call Right, InfoCast shall deposit with the
         Corporation  (as agent for the  holders of  Exchangeable  Shares) on or
         before the Liquidation  Date,  certificates  representing the aggregate
         number of InfoCast Common Shares and the Additional  Consideration,  if
         any,  deliverable by InfoCast in payment of the total  Liquidation Call
         Purchase Price. Provided that the total Liquidation Call Purchase Price
         has  been  so  deposited  with  the  Corporation,   on  and  after  the
         Liquidation Date the rights of each holder of Exchangeable  Shares will
         be limited to receiving such holder's  proportionate  part of the total
         Liquidation Call Purchase

                                       -8-



         Price payable by InfoCast upon presentation and surrender by the holder
         of  certificates  representing  the  Exchangeable  Shares  held by such
         holder  and the  holder  shall on and  after  the  Liquidation  Date be
         considered and deemed for all purposes to be the holder of the InfoCast
         Common  Shares  to  which  it  is  entitled.   Upon  surrender  to  the
         Corporation of a certificate or certificates  representing Exchangeable
         Shares,  together with such other  documents and  instruments as may be
         required to effect a transfer of Exchangeable Shares under the Business
         Corporations  Act (Ontario) and the by-laws of the Corporation and such
         additional  documents and instruments as the Corporation may reasonably
         require (including evidence reasonably  satisfactory to the Corporation
         that the holder of Exchangeable  Shares is not a non-resident of Canada
         within the  meaning of the  Income Tax Act  (Canada)  or a Section 1 16
         certificate with a certificate  limit in the payment amount) the holder
         of such  surrendered  certificate or certificates  shall be entitled to
         receive in exchange therefor, and the Corporation shall deliver to such
         holder,  certificates  representing the InfoCast Common Shares to which
         the holder is entitled.  If InfoCast does not exercise the  Liquidation
         Call Right in the manner  described  above, on the Liquidation Date the
         holders  of the  Exchangeable  Shares  will be  entitled  to receive in
         exchange  therefor  the  liquidation  price  otherwise  payable  by the
         Corporation  in  connection  with  the   liquidation,   dissolution  or
         winding-up of the Corporation pursuant to Article 4 of the Exchangeable
         Share Provisions.

3.2      InfoCast Redemption Call Right.

(a)      InfoCast shall have the overriding right (the "Redemption Call Right"),
         notwithstanding  the proposed  redemption of Exchangeable Shares by the
         Corporation pursuant to Article 6 of the Exchangeable Share Provisions,
         to  purchase  from  all  but  not  less  than  all  of the  holders  of
         Exchangeable  Shares to be redeemed on the Redemption  Date (as defined
         in the Exchangeable  Share Provisions) all but not less than all of the
         Exchangeable  Shares held by each such holder on payment by InfoCast to
         the  holder  of an  amount  per  Exchangeable  Share  equal  to one (1)
         InfoCast Common Share which shall be satisfied in full by delivering to
         such holder such number of InfoCast  Common  Shares equal to the number
         Exchangeable Shares so purchased plus the Additional Consideration,  if
         any,  (the  "Redemption  Call  Purchase  Price").  In the  event of the
         exercise of the Redemption Call Right by InfoCast, each holder shall be
         obligated  to sell all the  Exchangeable  Shares held by the holder and
         otherwise to be redeemed to InfoCast on the Redemption  Date on payment
         by InfoCast to the holder of the  Redemption  Call  Purchase  Price for
         each such Exchangeable Share.

(b)      To  exercise  the  Redemption  Call  Right,  InfoCast  must  notify the
         Corporation  (as agent  for the  holders  of  Exchangeable  Shares)  of
         InfoCast's intention to exercise such right at least 30 days before the
         Redemption  Date (as  defined in the  Exchangeable  Share  Provisions);
         provided,  however,  that if it is  impracticable  for InfoCast to give
         such  notice,  such  lesser  amount of notice as  practicable  shall be
         given.  The  Corporation  will notify the  holders of the  Exchangeable
         Shares as to whether or not InfoCast has exercised the Redemption  Call
         Right

                                      -9-



         forthwith  after the expiry of the period  during which the same may be
         exercised by InfoCast. If InfoCast exercises the Redemption Call Right,
         on the Redemption Date InfoCast will purchase and the holders will sell
         all  of  the  Exchangeable  Shares  to  be  redeemed  for a  price  per
         Exchangeable Share equal to the Redemption Call Purchase Price.

(c)      For the  purposes of  completing  the purchase of  Exchangeable  Shares
         pursuant to the Redemption Call Right,  InfoCast shall deposit with the
         Corporation  (as agent for the  holders of  Exchangeable  Shares) on or
         before the Redemption  Date,  certificates  representing  the aggregate
         number of InfoCast Common Shares plus the Additional Consideration,  if
         any,  deliverable by InfoCast in payment of the total  Redemption  Call
         Purchase Price.  Provided that the total Redemption Call Purchase Price
         has been so deposited with the Corporation, on and after the Redemption
         Date the rights of each holder of Exchangeable Shares so purchased will
         be limited to receiving such holder's  proportionate  part of the total
         Redemption  Call Purchase  Price payable by InfoCast upon  presentation
         and  surrender  by  the  holder  of   certificates   representing   the
         Exchangeable  Shares  purchased  by  InfoCast  from such holder and the
         holder shall on and after the Redemption  Date be considered and deemed
         for all  purposes  to be the holder of the  InfoCast  Common  Shares to
         which  it  is  entitled.   Upon  surrender  to  the  Corporation  of  a
         certificate or certificates  representing Exchangeable Shares, together
         with such other  documents and instruments as may be required to effect
         a transfer of Exchangeable  Shares under the Business  Corporations Act
         (Ontario)  and the  by-laws  of the  Corporation  and  such  additional
         documents and  instruments as the  Corporation  may reasonably  require
         (including evidence reasonably satisfactory to the Corporation that the
         holder of  Exchangeable  Shares is not a non-resident  of Canada within
         the  meaning  of  the  Income  Tax  Act  (Canada)  or  ~  Section  1 16
         certificate with a certificate  limit in the payment amount) the holder
         of such  surrendered  certificate or certificates  shall be entitled to
         receive in exchange therefor, and the Corporation shall deliver to such
         holder,  certificates  representing the InfoCast Common Shares to which
         the holder is entitled.  If InfoCast  does not exercise the  Redemption
         Call Right in the manner  described  above,  on the Redemption Date the
         holders  of the  Exchangeable  Shares  will be  entitled  to receive in
         exchange  therefor the Redemption Price (subject to Section 2.3 hereof)
         otherwise  payable by the Corporation in connection with the redemption
         of Exchangeable  Shares pursuant to Article 6 of the Exchangeable Share
         Provisions.

3.3      Tender Offers, Etc. In the event that:

         (i)      a tender offer,  share exchange offer,  issuer bid,  take-over
                  bid or similar  transaction  with  respect to InfoCast  Common
                  Shares is  proposed by  InfoCast  or its  shareholders  and is
                  recommended  for  acceptance  by the  Board  of  Directors  of
                  InfoCast;

         (ii)     less than fifty  percent  (50%) of the  outstanding  shares of
                  InfoCast are held of record by InfoCast's  stockholders  as of
                  the date hereof; or

                                      -10-



         (iii)    InfoCast   elects  to  initiate  the  voluntary   liquidation,
                  dissolution   or  winding-up   of  InfoCast   Canada  (each  a
                  "Triggering Event" and collectively the "Triggering Events"),

InfoCast  shall have the right to purchase all of the  Exchangeable  Shares then
outstanding in accordance  with the provisions of Article 6 of the  Exchangeable
Share Provisions.

                                    ARTICLE 4
                                  MISCELLANEOUS

4.1 Withholding  Rights.  InfoCast shall be entitled to deduct and withhold from
the  consideration  otherwise  payable  to  the  Shareholder  pursuant  to  this
Agreement  such  amounts as  InfoCast is  required  or  permitted  to deduct and
withhold with respect to such payment under the United States  Internal  Revenue
Code of 1986,  as  amended,  the Income Tax Act  (Canada),  as  amended,  or any
provision  of state,  provincial,  local or foreign  tax law. To the extent that
amounts are so withheld, such withheld amounts shall be treated for all purposes
hereof as having been paid to the Shareholder in respect of which such deduction
and  withholding  was made,  provided  that such  withheld  amounts are actually
remitted to the appropriate  taxing authority.  To the extent that the amount so
required  or  permitted  to be  deducted  or  withheld  from any  payment to the
Shareholder  exceeds the cash portion of the consideration  otherwise payable to
the Shareholder,  InfoCast is hereby  authorized to sell or otherwise dispose of
at fair market  value such  portion of such  consideration  as is  necessary  to
provide sufficient funds to InfoCast,  in order to enable it to comply with such
deduction or  withholding  requirement  and InfoCast shall give an accounting to
the Shareholder with respect thereto and any balance of such proceeds of sale.

4.2 Time of the Essence.  Time shall be of the essence of this Agreement and all
of the provisions of this Agreement.

4.3 No Assignment.  The Shareholder may not assign, transfer or otherwise convey
the whole or any part of such  Shareholder's  rights or  obligations  under this
Agreement  to any person  without  the  express  written  consent  of  InfoCast.
InfoCast  may assign,  transfer or otherwise  convey its rights and  obligations
under this  Agreement  to any  affiliate of InfoCast  without the prior  written
consent of any other party  provided that such  affiliate  agrees to be bound by
the terms of this  Agreement and provided that InfoCast shall not be relieved of
its obligations under this Agreement.

4.4  Successors.  This  Agreement  shall be binding  upon and shall enure to the
benefit of the parties hereto,  their heirs, legal  representatives,  successors
and permitted assigns.

4.5 Further Assurances. Each of the parties shall do all such things and provide
all such  reasonable  assurances as may be required to consummate the agreements
and  transactions  contemplated  hereby and each party shall execute and deliver
such further documents or instruments

                                      -11-



required by any other  party as may be  reasonably  necessary  or  desirable  to
effect the purpose of this Agreement and to carry out its provisions.

4.6  Governing  Law.  This  Agreement  shall be  governed  by and  construed  in
accordance  with the laws of the  Province  of  Ontario  and the laws of  Canada
applicable therein.

4.7 Attornment.  InfoCast hereby irrevocably  attorns and submits to, and agrees
to take all further steps necessary to submit to, the non-exclusive jurisdiction
of the Ontario Court of Justice  (General  Division) in any action or proceeding
arising  out of or related to this  Agreement  and  irrevocably  agrees that all
claims in respect of any such action or proceeding shall be heard and determined
in such Ontario court. InfoCast hereby irrevocably waives, to the fullest extent
it  may  effectively  do  so,  the  defence  of an  inconvenient  forum  to  the
maintenance  of such action or proceeding.  InfoCast  hereby agrees that a final
judgment  in any  such  action  or  proceeding  shall be  conclusive  and may be
enforced in other  jurisdictions  by suit on the judgment or in any other manner
provided by law.  InfoCast  hereby  irrevocably  designates  and appoints Aird &
Berlis,  Attention:  M.  Craig G.  Brown as its  authorized  agent to accept and
acknowledge  on its behalf  service of any and all process that may be served in
any such  action or  proceeding  in any such  court and agrees  that  service of
process  upon such  agent,  and  written  notice  of such  service  to  InfoCast
delivered to such agent,  shall be deemed in every respect  effective service of
process upon InfoCast in any such suit, action, or proceeding and shall be taken
and held to be valid personal service upon InfoCast.

4.8  Ontario  Securities  Law. The rights of the  Shareholders  pursuant to this
Agreement are subject to Section 1 1.15 of the Purchase Agreement.

4.9  Interpretation.  Subject  to  Section  2.3  hereof,  in the event  that any
provisions  of this  Agreement  are  inconsistent  with  or  conflict  with  the
Exchangeable  Share Provisions,  the Exchangeable  Share Provisions shall govern
and be paramount.

                                 -12-


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement  to be duly  signed,  sealed and  delivered as of the date first above
written.

                                       INFOCAST CANADA CORPORATION

                                       By: /s/ (signature is illegible
                                           ---------------------------


                                       INFOCAST CORPORATION

                                       By:/s/ A.T. Griffis
                                           ---------------------------


                                       HOMEBASE WORK SOLUTIONS LTD., as duly
                                       authorized signatory for each of the
                                       SHAREHOLDERS


                                       By:


                                      -13-