The event handler may set this property to TRUE to cancel the external URI scheme
launch. If set to TRUE, the external URI scheme will not be launched, and the default
dialog is not displayed. This property can be used to replace the normal
handling of launching an external URI scheme.
The initial value of the Cancel property is FALSE.
The event handler may set this property to TRUE to cancel the external URI scheme launch. If set to TRUE, the external URI scheme will not be launched, and the default dialog is not displayed. This property can be used to replace the normal handling of launching an external URI scheme. The initial value of the Cancel property is FALSE.