what i have previously was , an application developed using QX11EmbedWidget which accepts a window id argument and opens the application in the specified window id.

so i run the stand alone application usnig ./App 2

where 2 is the winId ( inface we can give any number)

the same appilcation can also be launched into someother application window which is QX11EmbedContainer widget.

what i am expecting from the blog is

createWindowContainer is the replacement for QX11EmbedContainer
and
fromWinId used to embed another window( which is an app in my case)

(QWindow * QWindow::fromWinId(WId id) [static]) (http://doc-snapshot.qt-project.org/5...equestActivate)

is my understanding correct. i have not tried these in a program yet and there are no sample snippets .