Memory leak in external interface SetReturnValue?

Question

I'm having trouble with a memory leak in my application. I'm
hoping someone out there can help me find a fix or workaround, or
tell me what I'm doing wrong.
The leak seems to be coming from the flash external
interface; specifically, IShockwaveFlash.SetReturnValue(String). My
application is written in Visual Basic 2008, connecting to Flash
9.0.124.0 (activex version).
I've written a fairly simple flash/VB program pair to
illustrate the problem.
The SWF contains a button, 2 dynamic text fields, and the
ActionScript 2 code below.
The VB project contains a Form with a AxShockwaveFlash object
and the VB code below.
When this program is run, and the button is clicked a lot
(10's of thousands of times), the application's memory creeps up
and never seems to fall back down. If the string passed to
SetReturnValue is longer, memory is consumed faster. But if the
call to SetReturnValue is commented-out, the application's memory
usage remains stable.
If anyone has any suggestions on how to proceed, I'd be
grateful.
(By the way: I'm using a freeware program called DoItAgain to
automate the button pressing.)

Answer 1

I have developed two simple Java and corresponding
C++ classes. Use code tags when you post your code.
You are missing a lot of error checking. JNI calls, every single one, will usually be followed by some sort of error checking. Any that access classes, methods, fields or allocate object must be followed by checks for java exceptions.
You will need to reduce your code to a smaller sample. Otherwise it is unlikely anyone will look at it.
You also need to specify how you know that a memory leak is occurring.