Create a bluprint function library class referencing another class :\

Hi! I am a beginner of C++

I want to make a simple function, but i want to be able to execute this in Character child classes, so I make a blueprint function library called “TstFunctionLibrary”, with a test function, but when I try to use some function created, the blueprint node function asks me for a “TstFunctionLibrary object reference”

How can i call this function from Character child class?

make the function “static”, so you can use it on any graph.

Thanks, i love you.