MSG-TV-DBLCLICK (value 16428)

This event occurs when the user double-clicks an item in a Tree View control that has no children. Items that have children expand or collapse when double-clicked. The ID of the item clicked is in EVENT-DATA-2.

You may set EVENT-ACTION to EVENT-ACTION-IGNORE to inhibit the control's internal handling of a double-click event. You should do this if you wish to transfer control to a new window in response to the double-click. If your code creates a new window here but does not ignore the event, the control's internal handling can deactivate your new window.