How to programmatically create application shortcuts/folders/links (Desktop Shortcuts) for Win/Lin/Mac?

the first thing that came to mind is from the command line to create them
cmd> mklink /?
I hope you know how to programmatically apply to cmd.
\r
nix I would have applied through the system( for example)
the program ln

*.lnk — binary format, not text, and is specific to win.

As for Linux e and e on a Mac, I unfortunately can not tell here a couple of articles to your question in Windows:
\rsupport.microsoft.com/kb/155303
\rmsdn.microsoft.com/en-us/library/bb774950(v=vs.85).aspx

I certainly could be wrong, but on the Mac create application shortcut to itself on every kind of desktops and other things is not Gud. The maximum that can be done is to register to the dock samostotelno. (which I, for one, hate). Plus, on the Mac the format of the references in findere also some binary, but I'm sure in the API there is functions.

In *nix at freedesktop.org/wiki/Specifications/desktop-entry-spec