How to make an asi file?
I got a source code of the ASI but I don't know how to use it to make a new ASI file
Please anybody help?
Compile it with Visual Studio.
You'll want to have the SDK. You can use a sample project as base or create a new project and add the ScriptHookV SDK files to that project (link the .lib, set the inc dir as a include directory). After that's all set up, compile it. Depending on what files you got or if it's just one file you might want to change some other project settings, but most should build fine with default settings.
Note that an .asi file is just a renamed .dll file, so make sure your project builds a dynamic library (.dll) and the target extension is .asi. In general just look at Alexander Blade did with the samples.