void moveMainWnd(int x, int y, int width, int height)
This method moves and/or resizes the SDM main window. The window is moved to the point (x,y), relative to the screen, where (0,0) is the upper-left corner of the screen. The window is also resized to the given width and height, unless either or both is zero. Thus, the method can be used in a move only mode by setting the last two arguments to zero.