这样定义的TDropFilesEvent是什么. of object有什么作用
type
TDropFilesEvent = procedure(Receiver: TWinControl;
const FileNames: TStrings;const FilesCount: Integer;
const DropPoint: TPoint) of object;
type
TDropFilesEvent = procedure(Receiver: TWinControl;
const FileNames: TStrings;const FilesCount: Integer;
const DropPoint: TPoint) of object;
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