it's it possible to make a frontcall for calling a function from an external DLL under windows ?
There used to be a section on this in the GDC documentation under
https://4js.com/online_documentation/fjs-gdc-3.20.16-manual-html/#gdc-topics/c_gdc_front_end_extensions_2.html but it appears to have been removed in the 3.00 version of the docs, not sure why it was removed.
Goto the archive section of the website and find the 2.50 GDC documentation, and look for section labelled "Front End Extensions". Effectively you have to create a wrapper for the dll you want to interact with.
Reuben