macOS startup an item at boot time

I want to startup an Xcode project at boot time. I have dragged my alias into "System Preferences/Accounts/Login Items" but when I boot it just brings up TextEdit with a blank window and the name of my alias.

What is the correct procedure to bring up my Xcode project during boot?

Yes and that is what I tried (dragged the .xcodeproj alias to the "Login items" list directly.

Sorry, I misunderstood ... I dragged the project file now instead of the alias and that works. Thanks.