@Cristineagru I find answering too quickly with citation impolite. You pin me down on text under change. Please put 10 minutes before you cite me, that is not a long time. You can start a submit, but take into account that it’s premature. Anyway, this same discussion about DLL’s and the risks involved we had elsewhere (here)
Back on topic: IMHO asking for direct calls is asking for too much 
I wouldn’t bet on an open platform any time soon. Interfaces still change, documentation lacks.. and MSFS was released early less than 1 year ago. If MS and Asobo would allow for DLL’s they are in for a (support, problem-solving) scenario they are not ready for.
Moreover, if MS and Asobo would release the binaries now, any company doing routers and GIS could profit without telling them. MSFS is a fantastic world renderer !