How to get vendor id and product id of a USB device on windows system

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eg:

SP_DEVICE_INTERFACE_DETAIL_DATA *pDetData = NULL;
DWORD dwDetDataSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA) + 256;
 
pDetData = (_SP_DEVICE_INTERFACE_DETAIL_DATA_A*) malloc (dwDetDataSize);
pDetData->cbSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA);
bOk = SetupDiGetDeviceInterfaceDetail (hDevInfo, &ifcData, pDetData, dwDetDataSize, NULL, &devdata);

SP_DEVICE_INTERFACE_DETAIL_DATA *pDetData = NULL;
DWORD dwDetDataSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA) + 256;

pDetData = (_SP_DEVICE_INTERFACE_DETAIL_DATA_A*) malloc (dwDetDataSize);
pDetData->cbSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA);
bOk = SetupDiGetDeviceInterfaceDetail (hDevInfo, &ifcData, pDetData, dwDetDataSize, NULL, &devdata);

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pDetData->DevicePath contains VID and PID in string form (eg. VID_xxxx&PID_xxxx), or you can use HidD_GetAttributes function in HID.DLL to extract these to a structure:

typedef struct _HIDD_ATTRIBUTES {
ULONG Size;
USHORT VendorID;
USHORT ProductID;
USHORT VersionNumber;
} HIDD_ATTRIBUTES, *PHIDD_ATTRIBUTES;