how to select the default screen for an application to run in? multi-head screen

[goldmanasia]

hi,

i have a external screen with my laptop in extension mode:


screen 1: laptop's native one

screen 2: external one
screen 2 is configured as the main display in windows 7 setup.
in my qt apps, when running it, it always starts in the main display (screen 2). is there any way to set the app to start in screen 1?

i tried the following codes, without working.


QDesktopWidget* desktop = QApplication::desktop();

QWidget *screenWidget = desktop->screen(2);

thanks a lot.