Extension for Game Maker 8.1 to allow dragging files onto the game window, based on DraggerDLL by Roach.
Starts or stops accepting files. Disabled by default - trying to disable while already disabled will crash the game.
Returns the number of files currently queued, or -1 if none.
Returns the filename of queued files where 0 is the first file. If no files are queued, returns "".
Clears the drag queue state.