Vb6 Serial Port Sniffer Source Code

Feb 26, 2009 - Net To install Serial Port Sniffer ActiveX Control into Visual Studio, click. For more information see the example source code for MS Visual C++. Menu item and choose “Serial Port Sniffer ActiveX Control”. CAN232 do not require a special COM port driver, since COM ports can be read and written to without any. Sample code in source code which we made or others have provided to us. C# CAN232 Monitor Lite (Version 1.0.0, 32bit Windows Installer). To be able to compile and change the code you need the VB6.

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Hello ShrishailHalijol, 1. >> But then, how do the Port Monitoring Tools (like one provided by Eltima) work? 1.1 Good commercial software which hooks the serial comm port would usually use a filter device driver that attaches itself to a serial port. 1.2 Client applications would generally have to perform the following: 1.2.1 Install the device driver to the system. 1.2.2 Obtain a handle to the device driver (this is achieved by a combined use of the CreateFile(), OpenSCManager(), OpenService() and StartService() APIs). 1.2.3 Communicate with the device driver by sending various IOCTL commands (this is done by calling the DeviceIoControl() API). 1.2.4 Receive events fired from the dvice driver (this is done by using DeviceIoControl() and WaitForMultipleObjects()).

1.2.5 Analyze the events which are usually connected with serial comm port activities (e.g. Comm port open/close read/write, etc). There is a good article on Dr Dobbs' Journal that provides a good implementation of such a filter device driver: 'A Serial Port Spy for NT' Source codes are provided. If I'm not wrong, the source codes for a sample user application are also provided.

You would need WinDDK if you want to compile the device driver. I hope the download will provide a ready built driver. The article is pretty old (1999) and was built for Windows NT. But the last time I checked, it still worked for Windows XP. SetWindowsHookEx Function installs an application-defined hook procedure into a hook chain. You would install a hook procedure to monitor the system for certain types of events. These events are associated either with a specific thread or with all threads in the same desktop as the calling thread.

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For more information, please refer to the links Have a nice day! Cookie Luo[MSFT] MSDN Community Support Please remember to mark the replies as answers if they help and unmark them if they provide no help. “ This response contains a reference to a third party World Wide Web site.

Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet. Hello ShrishailHalijol, 1. >> But then, how do the Port Monitoring Tools (like one provided by Eltima) work?

1.1 Good commercial software which hooks the serial comm port would usually use a filter device driver that attaches itself to a serial port. 1.2 Client applications would generally have to perform the following: 1.2.1 Install the device driver to the system. 1.2.2 Obtain a handle to the device driver (this is achieved by a combined use of the CreateFile(), OpenSCManager(), OpenService() and StartService() APIs). 1.2.3 Communicate with the device driver by sending various IOCTL commands (this is done by calling the DeviceIoControl() API). 1.2.4 Receive events fired from the dvice driver (this is done by using DeviceIoControl() and WaitForMultipleObjects()). 1.2.5 Analyze the events which are usually connected with serial comm port activities (e.g.