In this case, the device is a wireless network adapter. With this article, I would like to demonstrate how to query I tried put in UIO1: It would be great if u could please provide sample code if exits. I’m using Visual Studio and Windows 7 for my development eviroment. But newer NDIS 6 drivers use a different mechanism. You may also leave feedback directly on GitHub.

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Hi, I am very new to Win7 and Wifi programming.

Since WMI is buggy,i don’t recommend it. Using the code In this article, I will show you a C console application which queries the signal strength of the currently connected wireless network.

Keith Mann 4-Jan Your help is appreciated!


Read about this change in our blog post. I’m interested in querying using C in VS prof edition Thanks! Hi, I’m getting a driver handle open error on the CreateFile line. So, for example, here’s the relevant bit of Maju’s code: Sign up using Facebook.

c++ – DeviceIoControl error 87 for OID__11_BSSID_LIST – Stack Overflow

Because the developer has to implement the platform invoke mechanism and need to take care of the marshaling of data between managed and unmanaged code. If the CDB requests a data transfer operation, the caller must set up an adapter device aligned buffer from which or into which the miniport driver can transfer data directly.


If you have to work on Windows XP, where the API is not available, then you might need to ding around with other techniques. Check error code with system error code and verify why it is failing.

I have changed the Driver ID to what matches with mine.

But newer NDIS 6 drivers use a different deviceiocontol. As an example, we will see how to query for the signal strength of a wireless network. Next, we will see the DeviceIOControl calling section. It’s getting me crazy for a while, as I don’t know which param is wrong!

If DeviceIOControl returns a non-zero value, minipott indicates that the query is success, and the result can be received in the output buffer. The CreateFile function opens a handle to the device. I ran it on 2 pcs, vista and xp, and same error. In the following example function, a buffer is prepared as a device aligned data transfer buffer. This key lists down all the available network adapters in the system. Introduction to Display Drivers.


How to query miniport driver information (802.11 OIDs) using the DeviceIOControl() function

I’m trying it in a Win7 worksation. Post as a guest Name.

What could be the reason for it?? Drivers may also use the value in the AlignmentMask member of the adapter’s DeviceObject. PtrToStructure will do the marshaling of the unmanaged data to managed data, and the user can see the received signal strength value in the console window. Runing on Windows 7 sharkius Nov 6: This is available under the following Registry key: You may also leave feedback directly on GitHub.

Just identify the correct service name for your wireless card from registry and specify it in ‘printSignalStrength’ function. I’ve been googling for hours and can’t find the solution.

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