By default, the ShowContextMenu property is empty. The ShowContextMenu property can be used to disable, update, remove or add new items. The ShowContextMenu property indicates the items to be displayed on the object's context menu. The AllowContextMenu property specifies whether the control shows the object's context menu when the user presses the right click over a file or folder. 

The ShowContextMenu property supports the following predefined keywords:

• view keyword indicates the view the context menu is displayed for
• hlevel keyword specifies the index of the horizontal cascade column view the context menu is displayed for.
• hlevels keyword gets the count of horizontal cascade columns
• vlevel keyword specifies index of the vertical splitting panel the context menu is displayed for
• vlevels keyword gets the count of vertically split panels

This property/method supports predefined constants and operators/functions as described here.

The ShowContextMenu property indicates the list of commands to be displayed in the context menu, separated by comma (,). Each command must have an id parameter, that specifies the identifier of the command. Optional parameters are def for default item, and dis for disabled items. The sep parameter indicates a separator item. If adding new items to the object's context menu, use the ExecuteContextMenu property to get the identifier of the command to be executed during the ViewEndChanging event, when the Operation parameter is exExecuteContextMenu(21). 

For instance, the ShowContextMenu property on "Item 1[id=1][def],Popup[id=2](Sub-Item 2[id=2],[sep],Sub-Item 3[id=3])" shows the context menu as following: