Hide console of gui program coded by gtkD

[December Flower]

Hello.

I have a question about how to hide a console window.
http://pds23.egloos.com/pds/201212/10/80/e0088180_50c5e3b1bb789.png

This simple application is made by using gtkD and glade3. As you 
can see from picture above, console window pops up and doesn't 
disappear. When I close the console window, gui window also 
disappears. I also made a simple gui application without glade3, 
but it also showed console window. How can I hide this annoying 
console window?

Regards.