Is there any quick and easy way to find the use of SKSE in a mod, so you can look for alternatives?

So far, the mods I've ported up haven't used any SKSE calls, but I have at least one that does, and that's so dependent I'm not even trying yet. My worry is that I'll have a script that's not used much suddenly fail when the function doesn't exist.

SkyUI can tell if SKSE is installed (it'll spit out a great big warning if it isn't) so maybe take a look at how it does it?

edit: probably not what you're looking for though.

Gameplay>Compile Papyrus Scripts

Load your Mod, then try to compile every Script that way; as soon as it hits one with an SKSE function (assuming you don't have SKSE installed) it'll kick out a Compile Error.

Yes, I was forgetting that Skyrim doesn't mess things up when you do that. In Oblivion, it was "DON'T TOUCH THAT BUTTON!!!!"