u'''Fill Rectangle.

def rectangle(self, rect, attr=None, fill=u' '):
        u'''Fill Rectangle.'''
        x0, y0, x1, y1 = rect
        n = DWORD(0)
        if attr is None:
            attr = self.attr
        for y in range(y0, y1):
            pos = self.fixcoord(x0, y)
            self.FillConsoleOutputAttribute(self.hout, attr, x1 - x0, 
                                            pos, byref(n))
            self.FillConsoleOutputCharacterW(self.hout, ord(fill[0]), x1 - x0,
                                             pos, byref(n))