Setting A Unique @STATION Variable in Terminal Server and CTO Environments (Functions/Subroutines/Programs) [Revelation On-Line Wiki]

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====== Setting A Unique @STATION Variable in Terminal Server and CTO Environments (Functions/Subroutines/Programs) ======

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==== Created at 23 JUN 2010 03:09PM ====




**Overview**

OpenInsight applications are easily configured to run from Terminal Server environments. Often the only change needed is to make the variable @STATION unique. In a client / server LAN environment the @STATION variable is always unique across running instances of the application because Windows enforces unique station names on the network. In a terminal server environment @STATION is identical across all instances of the application on the terminal server because multiple applications are simultaneously running on the same machine. Most application developers prefer @STATION be unique for each running instance of the application.

 

By default CTO (Character To OpenInsight) applications have identical @STATION values. A CTO window executes inside the OEngineServer service on the database server which results in @STATION containing the name of the server and not the client where the window is running.

 

The article guides you through changing your application's @STATION variable to contain a unique combination of username and process id for CTO and terminal server environments.

 

**Directions**

1.     Open your application in development mode.

2.      

3.     Create a new procedure named **SET_STATION**.

4.      

5.     Copy the attached **SET_STATION.txt** file into the new routine.

6.   [[http://www.revelation.com/o4wtrs/KB_Articles/KB0270_files/set_station.txt|  ]][[http://www.revelation.com/o4wtrs/KB_Articles/KB0270_files/set_station.txt|{{kb0270_1.png}}]]

7.      

8.     Save and compile the routine.

9.      

10.  Open the record **SYSENV*ENV_APPLICATION** where **APPLICATION** is the name of your application.

11.   

12.  On field 32 (line 32) add **SET_STATION*APPLICATION** where **APPLICATION** is the name of your application. The image below demonstrates the field to change and value to enter if you were working in the examples application.

13.  {{kb0270_2.png}}

14.   

15.  Save **SYSENV*ENV_APPLICATION** and close OpenInsight

 

Start your application on the terminal server or in CTO mode and check the value of @STATION. You'll notice the value is now a combination of username and process id.

 

The SET_STATION routine is customizable. The @STATION variable is commonly used as a record key to store workstation specific settings between instances of the application. If this situation applies to your application you may choose to rewrite SET_STATION to return a specific value of the current username and client's workstation name that will persist between terminal server sessions.