[Resolved] How to response to client and open a form when DataArrival?

[SKAWilliam]

Hello

I have a server side program, it receive client message with WinSock. After receiving data, it will process the content and return a result message to client. If process result is successful (0), server side will open a form to keep process the next step, and close itselft at the same time. The problem is: When I open the form, sendData will not process until the new form was closed. I tried to run unload current form only, it will turn to unload but still cannot send response. It seems that SendData in DataArrival will process until DataArrival Complete. How to fix this problem? Thanks a lot and sorry for my poor English. Here is the related code:

Private Sub sckPDA_DataArrival(Index As Integer, ByVal bytesTotal As Long)

   Dim sStatus As String
    'Process received data
    sckPDA(Index).GetData sStatus, vbString
    If VerifyStatus(sStatus) Then
        resmsg = "0"
        blnStatusCorrect = True
    Else
        resmsg = "-1"
        blnStatusCorrect = False
    End If
    
     'A feedback to client side  
    If sendResponse(resmsg) = True Then
        sckSend.Close
        'Open form to process next step
        frmPhase2.Show vbModal, Me
    End If
        
    Unload Me
End Sub

Private Function sendResponse(ByVal resmsg As String) As Boolean
    sckSend.Close
    sckSend.Connect
    sendResponse = False
    
    Do
    DoEvents
        If sckSend.State = sckConnected Then
            sckSend.SendData resmsg
            sendResponse = True
        End If
    Loop Until sckSend.State = 7
    
End Function

[Doogle]

I suspect that you're closing the socket before the Send has completed. You should, perhaps, be using the SendComplete event to signal when the data has been sent and only when you receive that signal, close the socket.

[SKAWilliam]

Problem solved, thanks a lot!