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A client for testing non-blocking Winsock server

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Before you begin:

This code is a client part created for testing the non-blocking Winsock server sample code.

First run server code on any computer on your network. Enter acting server IP and port values on the client form.

Test button sends a short standard message.
Send button sends a message entered in the text box.
Transmit button sends a selected file.

All sent messages are stored in a memo column of a cursor on the server side.

* * *
VB.Net version of this code works in a similar way. It can send text strings and files to the non-blocking Winsock server. So you may use both codes, FoxPro and VB.Net, for testing the server.

See also:
  • How to create non-blocking Winsock server
  • Using the NetMessageBufferSend to send messages on the network
  • Using mailslots to send messages on the network
  • Peer-to-peer LAN messenger built with Mailslot API functions
  • Using WM_COPYDATA for interprocess communication
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    5368 bytes  
    Created: 2003-07-07 23:30:45  
    Modified: 2011-12-10 09:20:22  
    Visits in 7 days: 68  
    Listed functions:
    closesocket
    htons
    inet_addr
    send
    socket
    WSACleanup
    WSAStartup
    Printer friendly API declarations
    My comment:
    After establishing a connection and sending messages the client program usually keeps several local ports in the TIME_WAIT state for a short time.

    List of local ports in use can be obtained through the system NETSTAT command, or use example in this reference Displaying all TCP connections for the local system to get the list.

    Working with the NETSTAT Command.

    And there is a link with some TIME_WAIT related info on Experts-Exchange site.

    #kwd: sln_winsock.
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    User Contributed Notes:
    Rob | 2006-03-19 11:38:12
    does running this client portion ties up this copy of VFP from doing other tasks until the message is received?
    A.M. | 2006-03-19 16:40:36
    Server part: yes. You may try asynch calls, though anyway the state has to be checked by timer. There is no way to start a separate thread in pure VFP code.
    ezequiel@professional-soft.com | 2006-08-01 06:58:29
    What is it necessary to do to receive information of response of the server?

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