| NEWS RELEASE TRANSMITTED BY CANADIAN CORPORATE NEWS 
 FOR: DEVELCON ELECTRONICS LTD.
 
 TSE SYMBOL: DLC
 
 APRIL 5, 1999
 
 Develcon Announces Amendment of Agreement with Vianet
 
 TORONTO, ONTARIO--Develcon Electronics Ltd. today announced that
 it has signed an amendment to its previous agreement dated
 February 12, 1999 with Vianet Technologies, Inc. The changes to
 the original agreement result from the merger of Vianet with Radar
 Resources, Inc. and the resulting difference in the capitalization
 of Vianet from that anticipated during the earlier negotiations
 between Develcon and Vianet. The net effect of the amendment is
 to ensure that existing Develcon securityholders will receive the
 proportion of Vianet equity which was previously agreed.
 
 Under the terms of the amendment:
 
 - Develcon shareholders will receive one common share of Vianet
 for every 30.75 common shares of Develcon held by them instead of
 123 shares provided for in the previous agreement.
 
 - Holders of convertible debentures will receive .195 common
 shares of Vianet for each $1.00 principal amount of convertible
 debentures held by them rather than .04875 shares provided for in
 the previous agreement.
 
 - Holders of warrants and options of Develcon will obtain warrants
 or options to acquire Vianet shares on appropriately adjusted
 terms.
 
 - Holders of convertible debentures and holders of Develcon common
 shares who receive 8,000 or more Vianet common shares, as compared
 to 2,000 shares in the previous agreement, will be subject to
 resale restrictions with respect to the Vianet shares received by
 them.
 
 Develcon (TSE: DLC) is a global provider of enterprise network
 solutions and LAN/WAN connectivity. The Company is dedicated to
 uniting business and technology by delivering innovative products,
 providing world class customer service and meeting the needs of
 today's advanced business environments. Telephone companies,
 PTT's, Internet Service Providers, Banks, Governments and
 Enterprise clients around the world have implemented Develcon's
 networking solutions for core switching, edge network access and
 mission critical branch office applications. On February 16th 1999
 Develcon announced that it had entered into an agreement with
 Vianet Technologies, Inc. of New York, NY, whereby Develcon will
 merge with a subsidiary company of Vianet. Shareholder approval
 for this transaction will be sought by the middle of May 1999.
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