DOCUMENT:Q135453 01-FEB-2002 [crossnet] TITLE :Winsock Application Hangs Using TCP/IP-32 PRODUCT :Windows for Workgroups and Windows NT Networking Issues PROD/VER::3.11,3.11a,3.11b OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft TCP/IP-32 for Windows for Workgroups, versions 3.11, 3.11a, 3.11b ------------------------------------------------------------------------------- SYMPTOMS ======== If a Winsock application creates a window (hidden or not) to process connection messages from a non-blocking socket, the application may stop responding (hang) on the second connection attempt. CAUSE ===== If a Winsock application creates a window to processes Winsock messages for the connection, and the application deletes the window before the socket is closed, the application may appear to hang if it attempts to establish a new connection. Because the socket was not closed before the window was deleted, additional Winsock messages may be generated. Because the window that these Winsock messages are destined for no longer exists, the messages are undeliverable. These undelivered messages cause the application to hang. Additional query words: ====================================================================== Keywords : Technology : kbAudDeveloper kbTCPIPSearch kbZNotKeyword3 kbTCPIP311 kbTCPIP311a kbTCPIP311b Version : :3.11,3.11a,3.11b ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.