mastervol change and display windows master volume in c Credits https://gist.github.com/rdp/8363580 https://stackoverflow.com/a/47014922/6848772 https://github.com/rossy/crossc http://ptspts.blogspot.com/2013/12/how-to-make-smaller-c-and-c-binaries.html https://gist.github.com/pts/9ef2b1036d0b42508327559eeb2e0eb5
