TConnector: Version History

• Crash in Read()
  TCON-4684: Intermittent crash in Read() method of TConnector

• TCP Keep-Alive
  In previous versions a lost TCP connection could not be detected in a reasonable time. The reason was because the system default keep-alive time for TCP connections is 2 hours. Now the time interval can be specified by the user in the Service property with the following syntax: service#keepalivetime (milliseconds). The value applies to the current Winsock instance only.

• Multi-Threading Problem
  StopListen influences all instances of TConnector.
• BT/TCP Reconnect
  Reconnect does not work correctly when a BT/TCP connection was lost.

• I/O Type Bluetooth: Support for Bluetooth connections (if BTH device address is available).
• Support for Escape Zero Bytes in Read() and Write() method.

• Escape Zero Bytes removed last Byte from read data. Null Byte on first data position led to data loss.
• Virtual COM ports: Reading no data if serial buffer contains less Bytes than requested. Occurred only with specific drivers (e.g. AVM Bluetooth Stick, BlueFritz! USB).
• Device Open now tests for read access instead of write access.
• Access sample required TBarCode 6 installed.
• Excel sample VBA (wrong error code in error handler).

• TCP/IP does not support Timeout Infinite (this is by design of TCP/IP drivers).

• An already opened connection of one thread could be accidentally closed by another thread. Reason: in some cases both instances used the same "Default Ambient Name".
• If an error occurred during Open() another thread could be put into unlicensed mode (although originally licensed).

• New method: EmulateKeys() for emulating keyboard input of a captured string. Now Keyboard Wedge operation is also possible in synchronous data acquisition mode.

• New method: UseCodePage (for MultiByte - Unicode conversion)

• LPK licensing didn't work on Chinese/Japanese Microsoft Windows. The reason were the ASCII characters with <32 and >127. Encoding of ASCII characters was changed

• Sometimes a crash appeared during the OnClose event (TCP/IP) if it was already closed, was cleared.

• LPK licensing only works with Mem: Key (otherwise interference with Microsoft Access); license problems with Microsoft Access reduced.

• DLLUnregister doesn't unregister TConnectorps.dll automatically (otherwise a fault appears with Installshield, because DLLUnregister doesn't work two times.

• Bug Fix: RS232 Input Buffer Limit was increased from 4k to 32k (has an effect for Win98/ME)

• Bug Fix: Memory leak by State-Event

• New: DTRDefault, RTSDefault + ClearBuffer()

• XOn/XOff Bug (always "on"), Delimiter String extended

New:

• Web Licensing (LPK File)
• CAB File Setup

• Bug Fix Win2000: File pointer wasn't carried when reading.

Interface changes:

• Methods Read(), Write(): passing of parameters was changed for better support of Javascript/VBscript^®.
• SetStates() and GetStates() methods changed.

New:

• Methods: GetStateArraySize(), GetStateFromArray(), GetNoOfBytesRead(), SetSingleState()
• Extended support of Variant data types in methods GetStateFromArray() and SetStates().

• Bug Fix in Write method: if the product was licensed, after a specific number of write calls an "invalid page fault error" occurred.

• Problem when programming VBscript^® in ASP: object has no identifier, because not created on a form. Workaround: if GetAmbientProperty fails, an internal name (identifier) will be generated.

• Revision of the routines for serial, parallel and TCP communication
• Enhancements in stability (avoiding of deadlocks); when reopening a connection (by the same instance) the connection is automatically closed and then opened (opening caused some problems during debugging, if a code was interrupted and the connection stayed open)
• New methods (IsOpen, Get/SetState,...)
• New event: OnStatusChange

• New Feature: new method SetDebugLevel enables a trace function that writes all activities (depending on level) to a log file.
• Enhancement for distributing TConnector: only TConnector.dll has to be registered for redistribution (but don't forget to distribute TConnectorps.dll within the same path).

• Bug fix: StartListen (asynchronous communication mode) produced an error - cause: a Proxy-DLL wasn't registered within the setup routine.
• The licensing routine was changed.

• New properties: Prefix and Postfix characters that can be added automatically to the read and written data (including new key stroke control characters).
• Enhanced error codes

• New property: SendKeyStrokes simulates key strokes of incoming data characters (asynchronous mode).
• New events: OnClose occurs when connection to the server is terminated (TCP connection), OnError is fired when an error occurs during asynchronous mode (after StartListen).
• New method: TranslateErrNo () returns the error text according to the passed error number (from OnError event).
• Bug Fix: Multithreading

Start of the version history.