SocketTools ActiveX Edition Releases

Released: Apr 18, 2024

Updates in 11.0.2185.1657


  • Improved how the HTTP client handles persistent connections and will always include connection options regardless of protocol version.
  • Improved how the HTTP client attempts to recover from connections which fail due to a malformed request or an internal error reported by the server.
  • Added the HttpClearHeaders function to the HTTP client API which is similar to the ClearHeaders method in the ActiveX control and .NET class.
  • Changed the HTTP client to not include Content-Length and Content...

Released: Feb 28, 2024

Updates in 11.0.2180.1635


  • Corrected an issue which could cause SMTP authentication to unexpectedly fail when using an OAUTH2 token.
  • Corrected an issue where a malformed HTTP response header could result in an aborted connection, and in some cases an unhandled exception would be thrown, causing the application to crash.
  • Corrected an issue which could cause TLS compatibility options to be ignored under certain circumstances. This was related to a change made in the previous release that removed deprecated security...

Released: Jan 16, 2024

Updates in 11.0.2174.1610


  • Minor updates to the HTML Help and PDF documentation.
  • Changed the PostJson and PostXml methods to normalize single and double quote characters included in the request payload.
  • Updated some internal error handling to report more specific error codes in some cases when connection to a service is rejected.
  • Optimized the heap allocations and reduced the number of reallocations made when parsing very large MIME messages.
  • Changed the internal buffering algorithm to be more adaptive for FTP...

Released: Aug 30, 2023

Updates in 11.0.2148.1565


  • Corrected an issue which could cause file transfers to fail when automatic file type detection was used.
  • Corrected an issue which could cause the FTP TYPE command to be repeated before a file transfer started.

Released: Aug 21, 2023

Updates in 11.0.2148.1554


  • Added 'HttpSetRequestHeaders' function and 'HttpClient.AddHeaders' method which can be used to set multiple request headers.
  • Added 'HttpGetTextEx' function which provides additional options when returning text content in a string buffer.
  • Added 'InetGetUrlHostName' and 'InetConnectUrl' functions to simplify establishing TCP connections using a URL.
  • Added missing error codes in the interface definitions for the ActiveX controls.
  • Added support for 'GetText' and 'PutText' methods in the...

Released: Jul 26, 2023

Updates in 11.0.2142.1518


  • Added additional parameter checking with networking I/O functions and normalized the error codes returned when an invalid buffer address or content length is specified.
  • Minor updates and improvements to the HTML Help documentation.


  • Corrected a critical issue with secure connections which could cause the TLS stream buffers to be corrupted if the buffer size exceeded 16KiB.
  • Corrected an issue which could result in an incomplete message being sent using the Broadcast method with the...

Released: Jul 12, 2023

Updates in 11.0.2140.1494


  • Improved the handling of malformed MIME messages which contained invalid quoted-printable encoding.
  • Expanded support for several additional Asian and eastern European character sets in the MIME components.
  • Minor updates and improvements to the HTML Help and PDF documentation.


  • Corrected an issue with the IMAP components which prevented encoded UTF-7 folder names from being converted to Unicode.
  • Corrected an issue with the MIME components which mapped certain Asian character sets to...

Released: Jun 14, 2023

Updates in 11.0.2136.1480


  • Modified the FTP and HTTP server components to permit usernames and passwords using Unicode characters.
  • Modified the FTP server components to allow an at sign (@) in a username.
  • The SocketTools installer packages and components have been digitally signed with an extended validation (EV) Authenticode certificate which uses SHA-256 signatures.
  • This build of SocketTools does not include support for Microsoft Windows XP/Vista and their corresponding server platforms.


  • Corrected an...

Released: May 15, 2023

Updates in 11.0.2130.1468


  • Added support for the HTTP/2.0 protocol in all HTTP client components.
  • Updated security options for TLS 1.2 (and later versions) and SSH 2.0 to use cipher suites available in Microsoft Windows 11 and Windows Server 2022. Older, less secure cipher suites have been deprecated and will not be used when establishing a connection. A fallback option is available to connect to legacy servers using TLS 1.0.
  • The default security protocol and cipher suite selection for all secure connections have...

Released: Sep 7, 2022

Updates in 10.0.1430.2348


  • Improved handling of certain MIME character sets for non-European languages, particularly messages which use Chinese and Korean character sets.
  • Minor updates and improvements to the HTML Help and PDF documentation.


  • Corrected an issue with the FTP client components which could result in a memory leak when returning a large list of files in a folder.
  • Corrected an issue with the FTP client and server components which could cause UTF-8 encoded file names to be incorrectly converted to...