--- a/dwt/widgets/CoolBar.d	Sun Jun 08 15:11:48 2008 +0200
+++ b/dwt/widgets/CoolBar.d	Sun Jun 15 22:32:20 2008 +0200
@@ -12,8 +12,6 @@
  *******************************************************************************/
 module dwt.widgets.CoolBar;
 
-
-
 import dwt.DWT;
 import dwt.DWTException;
 import dwt.graphics.Color;
@@ -26,6 +24,7 @@
 import dwt.widgets.Event;
 import dwt.widgets.Control;
 import dwt.widgets.Listener;
+
 import dwt.dwthelper.utils;
 
 /**
@@ -950,7 +949,8 @@
     return indices;
 }
 void setItemOrder (int[] itemOrder) {
-    if (itemOrder is null) error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null for zero length string
+    //if (itemOrder is null) error(DWT.ERROR_NULL_ARGUMENT);
     int count = originalItems.length;
     if (itemOrder.length !is count) error(DWT.ERROR_INVALID_ARGUMENT);
 
@@ -992,7 +992,8 @@
     return sizes;
 }
 void setItemSizes (Point[] sizes) {
-    if (sizes is null) error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null for zero length string
+    //if (sizes is null) error(DWT.ERROR_NULL_ARGUMENT);
     CoolItem[] items = getItems();
     if (sizes.length !is items.length) error(DWT.ERROR_INVALID_ARGUMENT);
     for (int i = 0; i < items.length; i++) {
@@ -1143,7 +1144,6 @@
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if item order or sizes is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if item order or sizes is not the same length as the number of items</li>
  * </ul>
  */