How do I set a public variable in a native ActiveX DLL using Java?

Hello,
I have run into an issue that I cannot seem to find any documentation on, and all of my efforts with search engines have returned no useful results.
Here is my situation:
I have an Active X DLL that has a very simple configuration, but it is a third party DLL which I cannot modify. To interface with the DLL I have to set a series of public variables and then call a method with no parameters that will use the current values of the variables to perform a calculation. There are no "set" or "get" methods.
At this point I have a very good idea about how to use JNI to create the class in java, and call the method. However, this does me no good at all if I cannot set the variables.
Everything I have found so far defaults to an assumption of no direct access to variables, and that getter and setter methods would be available for that purpose. Anyone know of a way that this might be handled? I would provide source code, but it seems useless unless I know how to actually do this.
Thanks in advance for any input.

OK. Those are OLE/ActiveX/COM/WhateverTheyCallIt getters and setters, that VB makes look like object 'properties'.
If you are familiar a bit with C#, they also have 'properties', which are getters and setters hidden behind a syntax that makes them look like member variables.
I am affraid my help has to stop here, as I don't remember COM anymore.
But, unless you find someone who really knows COM, you will have to investigate by yourself.
One suggestion though: open a C++ project in VisualStudio 2005 or 2008 (not Express, it seems not to support what I describe).
Go to something like References or Add Reference and you will see a tabbed dialog box with a COM tab (I describe all this from memory).
Add your DLL. After this do View->Object Browser or alike. It should show your COM object. You will be able to examine its methods and properties.
I think Visual Studio canl generate code for invoking them. This is the C code that somehow you should take from there and place in your JNI code.
Edited by: baftos on May 9, 2010 11:22 AM
Correction: VS2008 Express also supports this, but to get there, you do View->Object Browser->Click the "..." button->COM tab.
VS2008 Express is free.
Edited by: baftos on May 9, 2010 11:25 AM

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