When you use Web targets, there are two possible values for the class path:
System default class path This value is stored in the CLASSPATH environment variable.
System options class path The Java page of the System Options dialog box lets you list directories and archive files to be searched in addition to those listed in the system default class path (without changing the system default value).
To go to the Java page of the System Options dialog, you can either:
Select Tools>System Options from the menu bar and click the Java tab.
Right-click anywhere in the Components tab of the System Tree and select Java Classpath from the pop-up menu.
If the Java VM has already started, you can see the effects of your changes by restarting PowerBuilder and expanding a Java branch on the Components tab of the System Tree.