Problem with Oswan emulator in full screen mode

Hi all!!

I'm trying to configure the Oswan emulator and it works ok, but the problem is when put it to full screen mode.

The screen backgraund is black and the emulator runs in a window in the middle of the screen (with the title bar include)

Anybody knows if its possible to launch this emulator in true full screen mode (without title bar)?

I'm using version 1.7 of this emulator for the wonderswan system.

Thanks in advance.