Hello,
The trial only includes the compiled files for Lazarus 2.0.12 Win32. You can follow these instructions to install the package
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Installing sgcWebSockets in Lazarus / FreePascal
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1) Unzip the files included into a directory {$DIR}
2) Add the directory where the files are unzipped {$DIR} to the Lazarus library path
under Tools, Environment options, Directories
3) From Lazarus
Choose : File, Open and browse Packages\sgcWebSocketsLazarus.lpk
(First compile and then install)
Compiled files are located on Lazarus Directory.
Kind Regards,
Sergio