{Think of memory stream as a file that is located in memory. So the writes
are very similar to the write command for files. (Actually it is closer to
the blockwrite command.)}
{To put a string the slow way you could do the following:}
for i := 1 to Length(s) do memstream.Write(s[i], 1);
{That would write the string one character at a time. Simple and easy to
understand, but a bit slow. A faster way would be to do the following:}
memstream.Write(s[1], Length(s));
{The two lines do the same thing, they append characters to the stream. If
you have never done a seek on the stream, they just append to the end.}
{Now to handle the line feeds you have to add them yourself:}
memstream.Write(#13, 1);
memstream.Write(#10, 1);
{Or you could do some sneaky things like this:}
procedure StreamWriteStr(var ms: TMemoryStream; s: string);
begin
ms.Write(s[1], Length(s));
end;
procedure StreamWriteLnStr(var ms: TMemoryStream; s: string);
begin
StreamWriteStr(ms, s + #13#10);
end;
{Or you could create you own descendant class of TMemoryStream with a method
to write strings.}