Method XbpClipBoard():registerChangeHandler() Foundation
Registers an Xbase Part as recipient for "change" messages
:registerChangeHandler( [<oXbp>] ) --> oOldXbp|NIL
The method returns the Xbase Part that is registered before the method is called. The return value is NIL when no Xbase Part is registered.
The method is used to register an Xbase Part as recipient for the xbeP_ClipboardChange event. If an Xbase Part is registered, an XbpClipboard object posts this event to the registered object each time the contents of the clipboard changes. As a result, the event is added along with the registered object to the event queue, where it is retrieved from lateron with the AppEvent() function. This way, the registered Xbase Part can react when data stored in the clipboard changes.
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