RAD Studio VCL Reference
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Introduces an abstract method that allows descendants to read and write unformatted data like a property.
procedure DefineBinaryProperty(const Name: string; ReadData: TStreamProc; WriteData: TStreamProc; HasData: Boolean); virtual; abstract;
virtual __fastcall DefineBinaryProperty(const AnsiString Name, TStreamProc ReadData, TStreamProc WriteData, Boolean HasData) = 0;
Each descendant filer object declares a DefineBinaryProperty method that reads or writes binary data as if the data were a property.
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