If you are willing to compile Oracle Forms on your PC having windows, XP, 7 or 8 then you have add an environment variable named "FORMS_PATH" and assign it a value where your forms, resources and plsql are available on your system.
In my case I have placed AU_TOP to my D: drive.
Then value of environment variable will be:
D:\au\12.0.0\resource;D:\au\12.0.0\plsql;D:\au\12.0.0\forms\US
Navigation:
Right Click on My Computer > Properties > Advance > Environment Variable.
