start up application

[dkaip]

Hello.
I am in a middle of a program, that start at beginning from Mint start-up applications.
To place at start up done by hand.
I am looking for a way installer puts program at start-up apps and at the end of program to checkout if there is link in start-up and if not, to make link again.
Thanks
Jim

[dkaip]

In place "I am looking for a way installer puts program at start-up apps " is wrong.
I am looking a code in my program to puts program link at start up applications.