How to delete modeless dialog?

[spirit]

probably, at first you create a window witout parent and then you pressed "Add with parent" button and created a window and so on. so, when you closed first window it was closed, but when you closed second one, automatically all children have been closed too.

[rajesh]

fisrt one also created by passing parent, but how this matters.
if I am closing 1st window it should close all child window, no matters 1st window having parent or not. it is matters of 2nd window having parent.

[spirit]

in main.cpp a new window is created, then when you click "Add without parent" and close first window the second will be opened. isn't it?

[rajesh]

I have never clicked on "Add without parent"

[spirit]

take a look at video, works fine.