Arguments: dialog widget
This function is called whenever a double left click is done on a control that implements double-clicks. The default method calls the on-double-click event-handler function of the control if it has one.
Double-click behavior could be specified for a whole control subclass by adding a double-click-event method rather than giving the same on-double-click event-handler function to every instance of the class.
Common Graphics and IDE documentation is described in About Common Graphics and IDE documentation in cgide.htm.
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Created 2000.10.5.