Maybe you're right. I have not tried this and don't know someone who has. I am reasoning with the example of DirectX. You should be able to release a GPL progr

Maybe you're right. I have not tried this and don't know someone who has. I am reasoning with the example of DirectX. You should be able to release a GPL program that uses DirectX, even though nobody has the source code for it. If some version of that is not right, it's impossible to make a GPL windows or Mac UI application.