Bug 50340 [Contributions] Large toolbar buttons under Windows XP
200401201132 - enable SWT to use Windows XP widgets (provide java.exe.manifest file; for details see SWT mailing list) - observe: the toolbar buttons are really large !! See attached screen shot
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
/**
	 * Returns <code>true</code> if this item is allowed to enable,
	 * <code>false</code> otherwise.
	 * 
	 * @return if this item is allowed to be enabled
	 * @since 2.0
	 */
	protected boolean isEnabledAllowed() {
		if (getParent() == null)
			return true;
		Boolean value = getParent().getOverrides().getEnabled(this);
		return (value == null) ? true : value.booleanValue();
	}
	/**
	 * The <code>ActionContributionItem</code> implementation of this 
	 * <code>ContributionItem</code> method extends the super implementation
	 * by also checking whether the command corresponding to this action is active.
	 */
	public boolean isVisible() {
		return super.isVisible() && isCommandActive();
	}
	/**
	 * Sets the presentation mode, which is the inclusive-or of the 
	 * <code>MODE_*</code> constants.
	 * 
	 * @return the presentation mode settings
	 * 
	 * @since 3.0
	 */
	public void setMode(int mode) {