Unsolved Run Qt application inside window of my main Qt application

[lartimus]

Does anyone have a good example of how to run one Qt application inside a window of another Qt application on a Linux desktop system?
I have Googled this, but not found a complete example.
Basically I need some sort of container Qt application (A) that starts up another Qt application (B), and shows B inside a window of A.

[VRonin]

Do you have access to the source code of B?

[lartimus]

@VRonin Yes I will have access to the source code of A and B.

[VRonin]

Then it's trivial. Look at the main function of B, it will probably instantiate a main widget, you can use that as a child widget of your application