Use Turbo C in Windows 7 operating system. Full 16 bit graphics of GNU C environment can be used.
click here to download
for further query you can check the following links:
http://sawaal.ibibo.com/computers-and-technology/how-use-dosbox-072-running-turbo-c-fullscreen-mode-699261.html
http://techtricks.co.in/programming/run-turbo-c-in-windows-vista
http://amitbpit.blogspot.com/2010/01/how-to-run-turbo-cc-or-16-bit-cc-in.html