Set Raspberry Pi Qt application to full screen mode

Question

How can I get my QT application to go into full screen mode?

I tried many things from the internet but none of them work. For exmple QMainWindow::setWindowFlags( Qt::CustomizeWindowHint | Qt::FramelessWindowHint ) and QMainWindow::showFullScreen( ) (this gives a SIGSEGV).

tia

Answer 1

Thank you Parisa.H.R that worked!