Can someone talk to me a little about design time code?

Apart from the simulate property, is there a way to write code that runs at design time. If not, then can I access the simulate property from code, so that I can say I want this code to run at design time, but not this code?

Currently my development interests are mostly around not creating games, but developing packages that other creators can use. I feel that robust design time code is conducive to that, but I’m struggling to find documentation or tutorials that focus on writing design time code.

Hi, I’m afraid there isn’t currently any way to write code that works within the editor.