list.setLayoutData(data);
Button b = new Button(parent, SWT.PUSH);
b.setText("Get Available Types");
b.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
list.removeAll();
String[] names = clipboard.getAvailableTypeNames();
for (int i = 0; i < names.length; i++)
list.add(names[i]);
}
});