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This property is has no effect if the type property is set to "button" or "reset".
Default value
No default value applies – either the url property or the on_click_wrname property must be specified.
Valid values
The name of a Webroutine. The Webroutine must exist in the WAM specified in the onClickWamName property. A list of known Webroutines can be displayed by clicking the corresponding dropdown button on the property sheet.