Bug 61313 Platform native icons not used in dialogs
N20040506 For example the 'info' icon for operations in progress, the 'error' icon when an exception occurs, and the 'question' icon when asked to confirm a resource deletion. These used to use the native icons on Windows XP but now they look quite different and non-native. This is a fairly recent regression.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
* Returns the button created by the method <code>createButton</code> for
	 * the specified ID as defined on <code>IDialogConstants</code>. If
	 * <code>createButton</code> was never called with this ID, or if
	 * <code>createButton</code> is overridden, this method will return
	 * <code>null</code>.
	 * 
	 * @param id the id of the button to look for
	 * 
	 * @return the button for the ID or <code>null</code>
	 * 
	 * @see #createButton(Composite, int, String, boolean)
	 * @since 2.0
	 */
	protected Button getButton(int id) {
		return (Button) buttons.get(new Integer(id));
	}
	/**
	 * Returns the button bar control.
	 * <p>
	 * Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @return the button bar, or <code>null</code> if the button bar has not
	 *         been created yet
	 */
	protected Control getButtonBar() {
		return buttonBar;
	}
	/**
	 * Returns the button created when <code>createButton</code> is called