how to get vendor id and product id of a plugged usb device on windows

Question

I am using Qt on windows platform.

i want to get and display vendor id and product id of a plugged usb device from my local system.

Below is my full source c

Answer 1

An alternative is to obtain the hardwareID which includes the VID and PID.

Call SetupDiGetDeviceRegistryProperty with SPDRP_HARDWAREID like so:

wchar_t *hardwareID;

// First get requiredLength
SetupDiGetDeviceRegistryProperty(deviceInfoList, &deviceInfoData, SPDRP_HARDWAREID, NULL, NULL, 0, &requiredLength);

hardwareID = (wchar_t*)(new char[requiredLength]());

// Second call to populate hardwareID
SetupDiGetDeviceRegistryProperty(deviceInfoList, &deviceInfoData, SPDRP_HARDWAREID, NULL, (PBYTE)hardwareID, requiredLength, NULL);

// Display the string
qDebug() << "hardwareID =" << QString::fromWCharArray(hardwareID);

This will give you a string like USB\ROOT_HUB20&VID1002&PID4396&REV0000 which you can parse.

*Note: not all devices will have a VID and PID, such as non-USB devices.