Server:

Código:
Private Sub Form_Load()
ws.Close
ws.Connect "127.0.0.1", 2848
End Sub

Private Sub ws_Connect()
ws.SendData "Tam:" & FileLen("C:\Prueba.txt")
End Sub

Private Sub ws_DataArrival(ByVal bytesTotal As Long)
Dim data As String
Dim Send As String
ws.GetData data

If Left(data, 8) = "SendFile" Then
Open "C:\Prueba.txt" For Binary As #1
Send = Space(LOF(1))
Get #1, , Send
Close #1

ws.SendData Send
End If

End Sub


Cliente:

Código:
Dim DataFile As String
Dim LenFile As Long
Dim Envio As Boolean

Private Sub Form_Load()
ws.LocalPort = 2848
ws.Listen
Envio = False
End Sub

Private Sub ws_ConnectionRequest(ByVal requestID As Long)
ws.Close
ws.Accept requestID
End Sub

Private Sub ws_DataArrival(ByVal bytesTotal As Long)
Dim data As String
ws.GetData data

If Envio = True Then
DataFile = DataFile & data
ProgressBar1.Value = Len(DataFile)
If Len(DataFile) = LenFile Then
Open "C:\Prueba2.txt" For Binary As #1
Put #1, , DataFile
Close #1
DataFile = ""
MsgBox "El Fichero se a Enviado Correctamente"
Envio = False
ProgressBar1.Value = 0
End If
End If

If Left(data, 4) = "Tam:" Then
LenFile = Mid(data, 5)
ProgressBar1.Max = LenFile
Envio = True
ws.SendData "SendFile"
End If

e puesto ademas para que salga un ProgressBar1  si no lo quiere simplemente elimina estas lineas:


Código:
ProgressBar1.Max = LenFile
ProgressBar1.Value = 0
ProgressBar1.Value = Len(DataFile)