How do I execute code in the Editor when Play is pressed?

Questions & Answers
1

How do I get my delegate installed if a script exists in Assets period?

I found I can add a delegate to EditorAppllication.playmodeStateChanged and it’s clear I can check for transitioning going into play like this

    void OnPlaymodeStateChange()
    {
        if (!EditorApplication.isPlaying && EditorApplication.isPlayingOrWillChangePlaymode)
        {
            DoStuffJustBeforePlaying();
        }
    }

What’s not clear is how to get that delegate installed in the editor. For example I currently have it in an EditorWindow. But an EdtiorWindow only gets instantiated of someone picks it from the menus. I could put it on a MonoBehavior but would only get executed if the user adds that behavior to a GameObject.

I need my delegate installed period. If the user has added my script to their assets folder I need my delegate to do some work when the user runs.

2

InitializeOnLoad