Where and how can you try to sell your ready-made code/library and how does the sale/purchase procedure go in general terms???

Question

C++ / C#

Dear toasters and toasters), please tell me, on what Internet resources you can try to sell your creation (ready code/library on a turnkey basis) (level, for example, where the program can send out on time (both delayed and in real time in 25 groups/walls of posts with pictures + pending posts simultaneously in 5 social networks (simultaneously): VK, OK, tweet (+ auto-like, + auto-following + auto-comments + pending posts, etc.), inst (+ too the same as on twitter), facebook with one button) - in general, for mass mailing and promotion. And how does the buying / selling procedure itself usually look like
? .for win-desktops, c#

Answer 1

publish the application in the windows store)) do you support win 8.1 or win 10?