Bug 77535 Control example coolbar tab uses images in drop down
In the coolbar tab of the ControlExample, enable Item styles "SWT.DROP_DOWN". Now make the coolbar 100x100 so that a chevron is required to see some of the items. On WindowsNT, menus do not support images. When you select the menu from the chevron of the coolbar, it is blank because there are only images in the menu items.
examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/controlexample/CoolBarTab.java
* (or 'chevron') is selected. Examine the event detail
			 * to determine where the widget was selected.
			 */
			if (event.detail == SWT.ARROW) {
				/* If the popup menu is already up (i.e. user pressed arrow twice),
				 * then dispose it.
				 */
				if (menu != null) {
					menu.dispose();
					menu = null;
					return;
				}
				
				
				CoolItem coolItem = (CoolItem) event.widget;
				Rectangle itemBounds = coolItem.getBounds ();
				itemBounds.width = event.x - itemBounds.x;
				Point pt = coolBar.toDisplay(new Point (itemBounds.x, itemBounds.y));
				itemBounds.x = pt.x;
				itemBounds.y = pt.y;
				
				
				ToolBar toolBar = (ToolBar) coolItem.getControl ();
				ToolItem[] tools = toolBar.getItems ();
				int toolCount = tools.length;
								
				/* Convert the bounds of each tool item to display coordinates,
				 * and determine which ones are past the bounds of the cool item.
				 */
				int i = 0;