unsafe static extern bool SetupDiGetDeviceInterfaceDetail(
IntPtr DeviceInfoSet,
ref SP_DEVICE_INTERFACE_DATA lpDeviceInterfaceData,
ref NativeDeviceInterfaceDetailData lpDeviceInterfaceDetail,
int detailSize,
ref int requiredSize,
IntPtr bPtr);
static extern Boolean SetupDiGetDeviceInterfaceDetail(
IntPtr hDevInfo,
ref SP_DEVICE_INTERFACE_DATA deviceInterfaceData,
ref NativeDeviceInterfaceDetailData deviceInterfaceDetailData,
UInt32 deviceInterfaceDetailDataSize,
out UInt32 requiredSize,
ref SP_DEVINFO_DATA deviceInfoData
);
private bool CheckConnectivity()
{
// Get the HID class guid
var guid = HidD_GetHidGuid();
// Get info about all connected HID devices
var h = SetupApiInterop.SetupDiGetClassDevs(ref guid, IntPtr.Zero, IntPtr.Zero, (uint)DiGetClassFlags.DIGCF_DEVICEINTERFACE);
if (h != INVALID_HANDLE_VALUE)
{
var success = true;
UInt32 i = 1;
while (success)
{
// Create the device interface data structure
var dia = new SP_DEVICE_INTERFACE_DATA();
dia.cbSize = Marshal.SizeOf(dia);
// Start the enumeration
success = SetupDiEnumDeviceInterfaces(h, IntPtr.Zero, ref guid, i, ref dia);
if (success)
{
var da = new SP_DEVINFO_DATA();
da.cbSize = (uint)Marshal.SizeOf(da);
// Build a Device Interface Detail Data structure
var didd = new NativeDeviceInterfaceDetailData();
didd.size = 4 + Marshal.SystemDefaultCharSize;
// now we can get some more detailed information
uint nRequiredSize = 0;
uint nBytes = (uint)BUFFER_SIZE;
if (SetupDiGetDeviceInterfaceDetail(h, ref dia, ref didd, nBytes, out nRequiredSize, ref da))
{
// current InstanceID is at the "USBSTOR" level, so we
// need up "move up" one level to get to the "USB" level
UInt32 ptrPrevious;
CM_Get_Parent(out ptrPrevious, da.DevInst, 0);
// Now we get the InstanceID of the USB level device
IntPtr ptrInstanceBuf = Marshal.AllocHGlobal((int)nBytes);
CM_Get_Device_ID(ptrPrevious, ptrInstanceBuf, (int)nBytes, 0);
string InstanceID = Marshal.PtrToStringAuto(ptrInstanceBuf);
Marshal.FreeHGlobal(ptrInstanceBuf);
}
i++;
}
}
}
SetupDiDestroyDeviceInfoList(h);
return(false);
}
