RAD Studio VCL Reference
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Classes.TWriterProc Type

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

Pascal
TWriterProc = procedure (Writer: TWriter) of object;
C++
(Writer: TWriter) ( TWriterProc)();

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. 

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

 

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