Good morning,
I got the full source package from
http://svn.freepascal.org/svn/fpcprojects/lnet/ and now I am able to compile lNet and lNetVisual as GetMem suggested.
Compilation is fine but there is still this warning:
Warning: other sources path of package "lnetbase 0.6.5" contains directory "..\lib_lnet", which is already in the unit search path.
I renamed the old ..\lib by ..\lib_lnet and changed the .pp files to ensure there is no conflict with already installed components but there is no effect on that.
With lnetvisual installed IDE compilation fails on compilation of the fpc components. I don´t know why the IDE compilation needs to compile fpc agin and how to fix.
Nachrichten, Warnungen: 1
Warning: other sources path of package "lnetbase 0.6.5" contains directory "..\lib_lnet", which is already in the unit search path.
IDE erstellen: Exit code 2, Fehler: 1, Warnungen: 1
Warning: Recompiling sslsockets, checksum changed for OpenSSL
fphttpclient.pp(285,6) Fatal: Kann sslsockets nicht finden verwendet von fphttpclient. Make sure all ppu files of a package are in its output directory. ppu im falschen Verzeichnis=C:\lazarus\fpc\3.0.0\units\i386-win32\fcl-net\sslsockets.ppu..
If there is no simple solution for the issue I have to go back to an older version

Best regards,
Jürgen