How to get value from c++ builder thread?

Question

Programming

Good day to all.
The question is, how to get the fs value from the stream?
The following code saves the resulting value, "1", to the "in.txt" file.

TStringList *s = new TStringList;
TMemoryStream *fs = new TMemoryStream();
s->Clear();
s->Add("sLine=123");
IdHTTP1->Request->Connection = "keep-alive";
IdHTTP1->Request->ContentType = "application/x-www-form-urlencoded";
IdHTTP1->Request->ContentLength = 9;
IdHTTP1->HandleRedirects=true;
IdHTTP1->Post( "http://www.example.com/index.php",s,fs);
fs->SaveToFile("in.txt");

However, when you try to "tear out" the value, nothing comes out. Returns null.
Tried like this:

char buf;
ShowMessage(fs->Read(&buf, 1));

Answer 1

Before reading, return the pointer to the beginning of the stream
fs->Seek(0, soFromBeginning);