Vb6 Serial Port Sniffer Source Code

Vb6 Serial Port Sniffer Source Code Rating: 9,1/10 1376 reviews

Serial Port Monitor is a professional and powerful system utility for RS232/RS422/RS485 port monitoring and control. COM monitor displays, logs and analyzes all serial port activity in a system. This is an ideal way to track down problems that may occur during application or driver development, testing and optimization of serial devices, etc. Serial Port Sniffer also offers advanced filtering and search, professional built-in terminal and data exporting options, user-friendly and flexible interface among its key advantages.

How to: Receive Strings From Serial Ports in Visual Basic.; 2 minutes to read. To receive strings from the serial port. Initialize the return string. All code that manipulates the serial port should appear within this block. Vbnet Serial Port Codes and Scripts Downloads Free. Serial Port Sniffer is a powerful advanced ActiveX Control that allows your application to sniff (fully monitor and edit data flows) serial port in your system.

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Serial Monitor can connect even to a COM port already open by any application to start sniffing it right away. All data going through the monitored port will show up in various views in our Serial Protocol Analyzer. Table view packets feature the transcript hint from Line view.

Everything is captured in real-time, so you can track down problems immediately. The synchronized highlighting of similar IRPs in different views is especially convenient for comparison purposes. Moreover, you can redirect all monitoring data to the specified file or you can copy all recorded data to clipboard. COM Port Monitor gives you the ability to intercept and record all serial input/output control codes (IOCTLs), tracking their full details and parameters. You can save any serial port monitoring session and load it next time whenever you need it with RS232 Monitor.

Well, as far as i know, IoGetDeviceObjectPointer() can not be used for all devices, specially when those devices already 'being opened' by another application. But there is another way to do 'attach and detach device', by creating a filter driver for those devices, modify some registry(ies) and let the PnP Manager and/or I/O Manager do that for you. For the detail how to do this, you can see the the sample in WDK, unfortunately i forgot what sample for specific, but i think (if i'm not mistaken) sample about disk performance. Member 10398370 7-Jan-14 21:58 7-Jan-14 21:58 Hello,Good afternoon,I have a question need to ask you.

In the filter driver development, when there is data in the data queue, using the event to notify the application. Create an event in the application, It is passed to the driver via DeviceIoControl. While waiting for an event using threads in the application, there is a signal event, to fetch data. Such a program structure, when the application is running, and the serial transceivers the data transceiver, PC happens blue screen.

If the application and the serial are not both running, PC does not blue screen.what causes the problem? In your routine, the application uses the OVERLAPPED structure, does OVERLAPPED I / O in the filter driver is necessary? Thank you very much. Member 10398370 wrote:Hello,Good afternoon,I have a question need to ask you. In the filter driver development, when there is data in the data queue, using the event to notify the application.

Create an event in the application, It is passed to the driver via DeviceIoControl. While waiting for an event using threads in the application, there is a signal event, to fetch data. Such a program structure, when the application is running, and the serial transceivers the data transceiver, PC happens blue screen. If the application and the serial are not both running, PC does not blue screen.what causes the problem? Well, unfortunately I've never use that event mechanism, so I can tell you nothing. Member 10398370 wrote:In your routine, the application uses the OVERLAPPED structure, does OVERLAPPED I / O in the filter driver is necessary?

Menyu December 23, 2008.

Actually it is just a trick. I was using OVERLAPPED structure, create asynchronous I/O, so I can make the handle of I/O request invalid from another thread by issuing CloseHandle() thus stopping 'the loop reader' (check out CDkPortClient::GetData(.) in file DkPortClient.cpp), without that 'the loop reader' will not stop and this will make application unstable or hung. Note that, this is the behavior of window application not DOS application. In DOS application I can make 'the loop reader' without create asynchronous operation, just create the loop in another thread then make handle invalid in the main thread, maybe this because NTVDM, which running below DOS application, might do some filtering mechanism before I/O operation reach the kernel. This behaviour is true, at least in the Windows XP with SP 2. .inf file is not part of the codes, it is more like a hint for Windows to install driver, and I wrote it 'manually' by 'guiden' of the samples in WDK.