How can I flush a stream through a socket?

[David Mathews]

I have a stream and socket based file transfer running (for large  
image files).
But the last partial file section is always dropped. I get an exact  
size of bytes on disk and in the file, and it is too small. The extra  
has been dropped.

I'm trying to do this with streams if at all possible. These files  
are already compressed, so I don't need the zlib stream as shown in  
the example I could find.

Everything works fine except for the tail of every file.
I've tried both File and FFile steams.

How can I get the last of the file to flush through the stream?

David


wxWidgets 2.8

// Client side

sock->Write(CurFileName,256);

wxFileInputStream * File = new wxFileInputStream(CurFile);
wxSocketOutputStream *SockOut = new wxSocketOutputStream(*sock);
SockOut->Write(*File);
SockOut->Sync();
SockOut->Close();
delete SockOut;
delete File;
sock->Destroy();

//Server Side


sock->Read(name,256);

strcpy(newfile,TextureFolder); // user selected local folder to  
receive files
#ifdef _WIN32
strcat(newfile,"\\");
#else
strcat(newfile,"/");
#endif
strcat(newfile,name);
wxFileOutputStream File(newfile);
wxSocketInputStream SockIn(*sock);
File.Write(SockIn);
File.Sync();
File.Close();