[Gambas-user] How to determine whether a program uses GTK or QT?

[Martin]

Hello.
Can anyone tell me how to know at runtime which component a program uses?
I'm looking for a similar way to know if the desktop theme is dark or not.
Ex:
If Application.DarkTheme Then
   Print "Hi Anakin"
Else
   Print "Hi Obi-Wan"
Endif

Note: There are some calls (I don't know if it's the right term) to 
OpenGL that don't work in GTK3 while in QT5 they do. So I want to get 
around what doesn't work when the program runs using the GTK3 component.

Thanks.