after lot of experiments and trying with different programming(scripting) languages I`m back on PureBasic (nice that now exists and LTS version!). After all , I learned a lot but actually I do not know nothing

Earlier I used Pureform and Jabpe (I saw it`s abandoned project, so will not use it anymore...), and succesfully made some simple utilities for my own needs. Of course, it worked well.
Today I installed PB 5.24 LTS and started to create new utility and...now I`m little bit confused.
Form is created without any problems, but....I realized that now is little different. I cound`t make that even simple Button click work.
Can You explain me please, how things is organized now ? If I saw well I need *.pbf (form file) and *.pb (file with code) that it could work.
Do You have some really basic example or tutorial just to see, "what is what" and how to start work now?
Thanx!