This manual is for people who don't want to waste their time trying to install all stuff that is required
Your account will be required to build all stuff that you'll need
Create repository that will be required to run GitHub Actions on it
Specify the name of repository and mark it private, if you don't want to make your .jar and .dll public
Click Import
to import
Specify this repository URL, e.g. https://github.com/radioegor146/jar-to-dll
Wait for import to complete
After completion go to your repository
Navigate to Settings
tab
Open Actions
menu
Click on General
Allow all actions to be run
Navigate to Actions
tab
Click Enable Actions on this repository
to enable actions
Navigate to Code
tab
Open Add file
menu
Click Upload files
to upload your .jar file
Rename your .jar file on your computer to input.jar
(IMPORTANT!) and drag-and-drop it here
Ensure that it is uploaded and click Commit changes
How that the file is uploaded, navigate to Actions
tab
Here, click on the running workflow
Wait for action to complete
Refresh page and verify that there are no warnings. Now you can download you .dll file and use it as you want!