How to Determine if SpeedScreen is Enabled on a Citrix ICA Client Connection

Open the Citrix Management Console and go to the Servers container. Select the Users Tab and double-click on a user’s session. Go to the Client Modules tab. If vdzlcn.dll is present, the connection is using SpeedScreen. The ZL stands for “Zero Latency” features. Page 397 of the Citrix MetaFrame XP Advanced Technical Design Guide says that vdzlcn.dll is the SpeedScreen module.



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