This is a tool to extract sprites from the data.win file of games made with Game Maker Studio. Lots of credit to PoroCYon for the info here and Mirrawrs for the info here, most of the knowledge needed for this came from them.
You can either double-click on the executable to bring up dialogues to choose the input file and output directory, or run it via the command-line:
Usage: GMExtract inFile outDir [-s|-a] inFile: The data.win file to extract from outDir: The folder to save the extracted files to -s: Only extract sprites -a: Only extract audio
Note that if run using the first method it will extract both sprites and audio.
The code should be compiled as a Neko or C++ command-line program (only tested in Neko).