typedef void __fastcall (__closure *TIncludeItemEvent)(const TOFNotifyEx &OFN, bool &Include);
TIncludeItemEvent is the type of the OnIncludeItem event handler. OFN is a Windows structure that includes information about the shell folder. Include is set by the event handler to indicate whether the item can be added to the list. Set Include to False to prevent this item from being added to the list.