a simple picture preview sending and receiving procedures revealed the use of UDP transport protocol.

Packet : 95302917picturesend.rar filelist
PictureSend\Picture.cpp
PictureSend\Picture.h
PictureSend\PictureSend.aps
PictureSend\PictureSend.clw
PictureSend\PictureSend.cpp
PictureSend\PictureSend.dsp
PictureSend\PictureSend.dsw
PictureSend\PictureSend.h
PictureSend\PictureSend.ncb
PictureSend\PictureSend.opt
PictureSend\PictureSend.plg
PictureSend\PictureSend.rc
PictureSend\PictureSendDlg.cpp
PictureSend\PictureSendDlg.h
PictureSend\ReadMe.txt
PictureSend\res\cursor1.cur
PictureSend\res\PictureSend.ico
PictureSend\res\PictureSend.rc2
PictureSend\resource.h
PictureSend\StdAfx.cpp
PictureSend\StdAfx.h
PictureSend\UDPSocket.cpp
PictureSend\UDPSocket.h
PictureSend\Debug
PictureSend\res
PictureSend

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