e shapes cursor and its toolBar.
   The following example shows how a custom shape is added using the WBCustomShapeFactory
   
   <pre>
     var triangleShape:WBShapeToolBarDescriptor = new WBShapeToolBarDescriptor(WBShapeToolBarDescriptor.TOOL); //Shape is of type tool
     triangleShape.toolTip ="Triangle";
     triangleShape.shapeFactory = new WBCustomShapeFactory(WBTriangleShape, CURSOR_PEN, new WBTrianglePropertiesToolBar());
     triangleShape.icon = ICON_TRIANGLE;
     toolBar.addCustomShapeToToolBar