Profit Thank you for your 200 messages about Java. I was not so hungry. But I have learned many things. But now I have a background server task written in java and I would like it to call C function to manage shared segments. The *.h in the directory include of the JDK and the use of javah is difficult enough without documentation. AS a result my test class is refusing to load my native shared library. I would like a little help for I whish to keep the principle of my unique server task written in Java. Thank you very much.