How to obtain the Java environment in the already loaded dll

Hi all!
I try to implement a client GUI in Java. I load the static (c++) dll from the Java code, this work fine. But, I want to call also from the loaded dll to the client GUI, make a two-directional communication. How can I obtain the valid environment pointer in the c++ code?
Can you please help me?
Thanks very much
JAttila

There is a method that returns the environment.
But, I want to call also from the loaded dll to the client GUI,In response to what? If a thread then you have to also register the thread.

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