The Source File of my Application got really large. Thats why I wanted to split it into multiple files.
I ran into the following problem:
In class A I initialize the UI. But how can I check the state of components (i.e. checkstate of checkbox) from another source file?
class A conntects PushButtons to functions in class B and class B needs to know the checkstates of some components.
Obiously I can't include class A in class B and class B in class A becaue this would lead into a cycle and the program won't compile/start.

I hope someone can help me to solve this Problem.