How to generate a function panel file (.fp) properly in CVI

Hi!
[Windows 10; CVI 2015  15.0.0(413)]
I am developing a .dll in c using LabWindows/CVI. I need a .fp file to include it in the .dll so i can see function prototypes when i include the .dll in TestStand. 

I have difficulties creating a .fp file. When i see guideline for creating .fp (http://www.ni.com/tutorial/6503/en/#toc6) i can see, that after creating the fp, there is already filled functions. But that doesnt work for me. When i go Options-> Generate Function Tree... i get the .fp file, but it is empty! Not prefilled with function prototypes.
Why in the guidline i have provided earlier (http://www.ni.com/tutorial/6503/en/#toc6) there are generated functions in the .fp file? What i need to do to achieve the same result? I want to avoid adding the functions manually and filling the parameters my self. 

I am enclosing snippets of my header file and what i fill into "generate function tree dialog".

Thanks for responds!