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
item.setToolTipText ("SWT.CHECK");
		item = new ToolItem (toolBar, SWT.CHECK);
		item.setImage (instance.images[ControlExample.ciTarget]);
		item.setToolTipText ("SWT.CHECK");
		checkItem = new CoolItem (coolBar, itemStyle);
		checkItem.setControl (toolBar);
		Point checkSize = toolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT);
		checkSize = checkItem.computeSize(checkSize.x, checkSize.y);
		checkItem.setSize(checkSize);
		checkItem.setMinimumSize(item.getWidth(), checkSize.y);
        checkItem.addSelectionListener (new CoolItemSelectionListener());
		
		
		if (order != null) {
			coolBar.setItemLayout(order, wrapIndices, sizes);
			/* 
			 * special case: because setItemLayout will restore the items
			 * to the sizes the user left them at, the preferred size may not
			 * be the same as the actual size. Thus we must explicitly set
			 * the preferred sizes.
			 */
			pushItem.setPreferredSize(pushSize);
			dropDownItem.setPreferredSize(dropSize);
			radioItem.setPreferredSize(radioSize);
			checkItem.setPreferredSize(checkSize);
		}
		else {
			coolBar.setWrapIndices(new int[] {1, 3});
		}