how to pass QSystemTrayIcon control between QDialog and QmainWindow

[umen]

i have QDialog that closing after its done its flow and i start QmainWinodw , in the QDialog i init QSystemTrayIcon with the QDialog as parent
after the Qdialog closed , i like to change the QSystemTrayIcon icon from the QmainWinodw , how can i pass the control of the QSystemTrayIcon from QDialog to QMainWindow ?

[Santosh Reddy]

It is not very clear, can you post the sequence of QDialog & QMainWindow