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   <title>NT Classpath</title>
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Environment variables are administered on Windows NT from the
<b>System
Properties</b> Control Panel settings (Start->Settings->Control Panel;
it's the <b>System</b> icon in the Control Panel). The <b>Environment</b>
tab contains all of the System and User Variables.
<p>System Variables exist for all users while User Variables only exist
for the current user. Only users with Administrator privileges are able
to define System Variables. For this example, environment variables will
be defined as User Variables.
<p>If this is the first time the CLASSPATH environment variable is being
defined, select the first User Variables entry (its name/value pair will
show up below the User Variables list). Enter 'CLASSPATH' in the 'Variable:'
text edit field.
<p>If the CLASSPATH environment variable has already been previously defined,
simply select it from the User Variables list.
<p>There are a couple of ways of adding something to an environment variable.
It can be added directly, or through the use of a separately defined environment
variable.
<p>When the JavaMail and Java Activation Framework (JAF) jar files are
added directly to the CLASSPATH, the Value field should contain (for example)
".;D:\Java\javamail-1.2\mail.jar;D:\Java\jaf-1.0.1\activation.jar".
<p><img SRC="images/direct-classpath.jpg" height=466 width=410>
<br>&nbsp;
<p>When the JavaMail and Java Activation Framework (JAF) jar files are
added to the CLASSPATH using separate environment variables, the Value
field should contain (for example) ".;%JAVAMAIL_JAR%;%JAF_JAR%"
<br>&nbsp;
<p><img SRC="images/indirect-classpath.jpg" height=466 width=410>
<br>&nbsp;
<p>Once you have finished updating the Value field, you must press the
Set button. Then press OK. It is not necessary to reboot or log out, however
these new settings will only be present in new Command Prompt windows.
Any existing windows must be closed and reopened for the new settings to
take effect. Any running Java applications which inherit the system CLASSPATH
also need to be restarted.
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