procedure WriteStringToStream(
    AStream: TIdStream; 
    const AStr: string
);

WriteStringToStream is a procedure used to write the values in AStr to the stream specified in AStream. 

AStream is the Stream used for outputting values in the write operation. 

AStr contains the Delphi string value to be written to the output stream. 

WriteStringToStream isolates the differences between platform-specific stream implementations supported by the Indy library. 

For the .Net platform, WriteStringToStream uses a TIdBytes instance to convert the values in AStr to a format suitable for writing to the stream implementation. 

Use one of the following common stream routines to read or write the associated ordinal data type using a stream instance: