Using a user-built lib in application opens also a cmd window. Why?

Hello everyone,

I have build a static lib (applicationLib.h and applicationLib.lib).

Now, I am using this lib in another Qt application.
The code is simple:

#include <qapplication.h>
#include “applicationLib.h”

int main( int argc, char ** argv )
{ QApplication a( argc, argv ); ApplicationLib *mw = new ApplicationLib(); mw->setCaption( “Qt Example – Application” ); mw->show(); a.connect( &a, SIGNAL), &a, SLOT) ); return a.exec();
}

When starting, the correct GUI shows, but additionally (actually before the GUI appears) a cmd window opens.
How can I get rid of it?

Thanks!