GridData textareaData = new GridData(150, 150);
textareaData.verticalAlignment = GridData.BEGINNING;
textareaString.setLayoutData(textareaData);
// ComboBox
comboString = new ComboBox(parent, SWT.NONE);
comboString.setValueList(new String[] { "Un", "Deux", "Trois", "Quatre", "Cinq", "Six",
"Sept", "Huit", "Neuf", "Dix" });
GridData comboData = new GridData(150, 25);
comboData.verticalAlignment = GridData.BEGINNING;
comboString.setLayoutData(comboData);