Gets or sets the URL to a custom image that is displayed in a dynamic menu item when the dynamic menu item has a submenu.
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When a dynamic menu item contains a submenu, an image can be displayed to indicate that the user can expand the menu by positioning the mouse pointer over the menu item. There are two ways to display this image:
Set the Menu.DynamicEnableDefaultPopOutImage property to true to use the built-in image (default).
Set the Menu.DynamicPopOutImageUrl property to specify a custom image.
If the Menu.DynamicPopOutImageUrl property is set, that image overrides the built-in image.
If the Menu.DynamicPopOutImageUrl property is not set and the Menu.DynamicEnableDefaultPopOutImage property is set to false, no image is displayed.
When you set this property, use a slash mark (/) instead of a backslash (\). If you use backslashes in the path, the specified image will not be displayed.
You can specify alternate text for the image by setting the Menu.DynamicPopOutImageTextFormatString property.