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    <p>If you're using D2009 or later, then when sending, you're cutting the data in half. Also, given you will ultimately be reading the data with <code>ReceiveBuf</code>, it would probably be sensible to prepend a length marker. Less substantively, you also don't need to set the memory stream's <code>Size</code> up front, and should wrap the stream usage in a try/finally block:</p> <pre><code>procedure TForm1.Button1Click(Sender: TObject); var myStream : TMemoryStream; chat : String; Len: Int32; begin //Creating a stream chat := 'bladibla'; myStream := TMemoryStream.Create(); try Len := Length(Chat); myStream.WriteBuffer(Len, SizeOf(Len)); myStream.WriteBuffer(Pointer(Chat)^, Len * SizeOf(Char)); //Resetting the stream position myStream.Position := 0; //Sending the stream TcpClient1.Active := true; TcpClient1.SendStream(myStream); TcpClient1.Active := false; finally //Free the stream myStream.Free; end; end; </code></pre> <p>In the case of the receiving code, you haven't pre-allocated the <code>Chat</code> buffer. As such, <code>Length(Chat)</code> will be 0. Given my suggested code above, we can read off the length marker first:</p> <pre><code>procedure TForm1.TcpServer1Accept(Sender: TObject; ClientSocket: TCustomIpClient); var chat : string; Len: Int32; begin //Receives the message from the client ClientSocket.ReceiveBuf(Len, SizeOf(Len),0); SetLength(Chat, Len); ClientSocket.ReceiveBuf(Pointer(Chat)^,Len * SizeOf(Char),0); memo1.Lines.Add(chat); memo1.Lines.Add('------'); end; </code></pre> <p>Lastly... the components used in this code are deprecated, so it might be an idea to investigate Indy instead.</p>
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    1. PODelphi memory stream to server
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    1. USChris Rolliston
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    1. COAnother thing, but given the situation is a bit like defining a custom file type, it would probably be a good idea to avoid the generic 'string' type and use one with a specific encoding instead, just to make the nature of the data sent explicit in the code (that's why I used Int32 rather than Integer).
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    2. COThank you, this works perfectly. I am now gonna see why exactly :)
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    3. COby "specific" do you meen something like shortstring or widetring?
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