extern public static void XSetWMNormalHints
			(IntPtr display, XWindow w, ref XSizeHints hints);
	// Construct the XSizeHints structure for this window.
	private XSizeHints BuildSizeHints(int x, int y, int width, int height)
			{
				XSizeHints hints = new XSizeHints();
				if(x != 0 || y != 0)
				{
					hints.flags = SizeHintsMask.USPosition |
								  SizeHintsMask.USSize;
					hints.x = x;
					hints.y = y;
				}
				else
				{
					hints.flags = SizeHintsMask.USSize;
				}
				hints.width = width;
				hints.height = height;
				if(minWidth != 0 || minHeight != 0)
				{
					hints.flags |= SizeHintsMask.PMinSize;
					hints.min_width = minWidth;
					hints.min_height = minHeight;
				}
				if(maxWidth != 0 || maxWidth != 0)
				{
					hints.flags |= SizeHintsMask.PMaxSize;
					hints.max_width = maxWidth;
					hints.max_height = maxHeight;
				}
				return hints;
			}