This topic provides an outline for developing an ActiveX Windows
program, such as Visual Basic, VBScript, and Active Server Pages, to use the
WebSphere ActiveX to EJB bridge to access enterprise beans.
Before you begin
Important: This topic assumes that you are familiar with
ActiveX programming and developing on the Windows platform.
Consider
the information given in ActiveX to EJB bridge as good programming guidelines.
About this task
To use the ActiveX to EJB bridge to access a Java class, develop
your ActiveX program to complete the following steps:
Procedure
- Create an instance of the XJB.JClassFactory object.
- Create Java virtual machine (JVM) code within the ActiveX program
process, by calling the XJBInit() method of the XJB.JClassFactory object.
After the ActiveX program has created an XJB.JClassFactory object
and called the XJBInit() method, the JVM code is initialized and ready for
use.
- Create a proxy object for the Java class, by using the XJB.JClassFactory
FindClass() and NewInstance() methods. The ActiveX program
can use the proxy object to access the Java class, object fields, and methods.
- Call methods on the Java class, using the Java method invocation
syntax, and access Java fields as required.
- Use the helper functions to do the conversion in cases where automatic
conversion is not possible. You can convert between the following data types:
- Java Byte and Visual Basic Byte
- Visual Basic Currency types and Java 64-bit
- Implement methods to handle any errors returned from the Java class.
In Visual Basic or VBScript, use the Err.Number and Err.Description fields
to determine the actual Java error.