How to maximize a window in qt that has been minimized earlier?

Question

Qt

I actually minimize the window and open a new one.

void H_Key::on_close_key_clicked()
{
    
    showMinimized();
    Min *mn = new Min;
    mn->show();

}

And then in a new window, when I click on the button, I close this window.
And by code, I managed to call a new one.
And how to open collapsed?

void Min::on_pushButton_clicked()
{
    close();
  
    H_Key *rz = new H_Key;
    rz->showNormal();

}

Answer 1

Nothing can be understood from these snippets of code, make a minimal working draft and give a link to the archive. Also, name your variables and classes properly .