filep = new UXFileBrowserInput(shell);
UXFormLayoutUtil.setPosition(filep, 0, 100, null, 0);
filep.setLabel("File:");
linesSpinner = new UXSpinner(shell);
linesSpinner.setLabel("Number of lines:");
UXFormLayoutUtil.setTop(linesSpinner, filep, 5, SWT.BOTTOM);
UXFormLayoutUtil.setLeft(linesSpinner, 0);
linesSpinner.setSelectionBounds(1, 10000);