I am open application with Qprocess i want embed Qprocess window in Qmainwindow can anybody give example.
Not without knowing what "i want embed Qprocess window in Qmainwindow" means to you.
QProcessruns a process. You can access stdin/out/err of child from parent. If child is its own GUI process (e.g. Windows Notepad), it will have its own window, you can't make that window be inside or part of or share your Qt parent's main window. You'd need some kind of "embedding" for that, which only certain clients might support.