C / C++ / MFC

<br />
	char sHeader1[53]={"A"};<br />
	CString sHeader2;<br />
	sHeader2.Format("%s rest of my message here", sHeader1);<br />
	m_sConnectSocket.Send((LPCTSTR)sHeader2, strlen(sHeader2));<br />

char message[128];<br />
memset( message, 41, sizeof( message ) );<br />
strcpy( &message[53], " rest of message header here" );<br />
m_sConnectSocket.Send( message, 128 );<br />

// how long is your header gonna be, then how many #'s here
#define THE_HEADER _T("###...##")

// To make your packet:
CString sPacket = CString(THE_HEADER) + _T("your real contents");

// Now send your packet
socket.Send((LPCVOID)(LPCTSTR)sPacket, sPacket.GetLength() * sizeof(TCHAR));

// And the receiver then replace the #'s with null's
TCHAR szReceived[1024] = _T("");
receiver.Receive((LPVOID)szReceived, 1023); // suppose 1023 is enough
for (int i = 0; szReceived[i]; i++)
{
    if (szReceived[i] == _T('#'))
        szReceived[i] = _T('\0');
}

// Now you get what you want

int SendStringWithLeadingNulls( CAsyncSocket &SendSocket, const char *Str )
{
    BYTE   NullBuffer[53] = {'\0'};
    int    BytesSent;

    BytesSent = SendSocket.Send( NullBuffer, sizeof(NullBuffer) );
    if( BytesSent < sizeof(NullBuffer) )
        return(BytesSent);
    return( SendSocket.Send( Str, lstrlen(Str)+1 ) );
}

BYTE    Buffer[1024];
int     BytesReceived;
CString Str;

BytesReceived = ReceiveSocket.Receive( Buffer, sizeof(Buffer) );
if( BytesReceived > 53 )
    Str = (char *) (Buffer + 53);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen