Some advice on how to structure this program?

[yogeshgokul]

how come I can use a dll like this? I thought that a dll required a much more complicated setup procedure and calling functions from dlls required setting up pointers etc... and using the windows API?
Ty

This is a big topic, please google some docs for dynamic libraries. There is adequate information available.
QLibrary is used to load DLLs and resolve any symbol from DLL.