RAD Studio VCL Reference
Classes.TReaderProc Type

TReaderProc is a type of callback procedure called used by TFiler and descendant DefineProperty methods.

TReaderProc = procedure (Reader: TReader) of object;
(Reader: TReader) ( TReaderProc)();

DefineProperty introduces an abstract method that allows descendants to read or write data like a property. 

Each descendant filer object declares a DefineProperty method that defines the data that the descendant object will read or write as if the data were a property. 

TReaderProc is the callback procedure parameter in that DefineProperty. When called, it supplies the TFiler or descendant object, allowing read access. 


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