private Native.SP_DEVINFO_DATA GetDeviceData(Native.SP_DEVICE_INTERFACE_DATA interfaceData, out int size)
{
Native.SP_DEVINFO_DATA devData = new Native.SP_DEVINFO_DATA();
size = 0;
if (!Native.SetupDiGetDeviceInterfaceDetail(_deviceInfoSet, interfaceData, IntPtr.Zero, 0, ref size, devData))
{
int error = Marshal.GetLastWin32Error();
if (error != Native.ERROR_INSUFFICIENT_BUFFER)
{
Exception ex = Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error());
Logger.Log(LogLevel.Error, ex);
throw ex;
}
}
return(devData);
}
private Native.SP_DEVICE_INTERFACE_DATA GetInterfaceData(int index)
{
Native.SP_DEVICE_INTERFACE_DATA interfaceData = new Native.SP_DEVICE_INTERFACE_DATA();
if (!Native.SetupDiEnumDeviceInterfaces(_deviceInfoSet, null, ref _classGuid, index, interfaceData))
{
int error = Marshal.GetLastWin32Error();
if (error != Native.ERROR_NO_MORE_ITEMS)
{
Exception ex = Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error());
Logger.Log(LogLevel.Error, ex);
throw ex;
}
return(null);
}
return(interfaceData);
}
private string GetDevicePath(Native.SP_DEVICE_INTERFACE_DATA interfaceData, Native.SP_DEVINFO_DATA devData, int size)
{
IntPtr buffer = Marshal.AllocHGlobal(size);
try
{
Native.SP_DEVICE_INTERFACE_DETAIL_DATA detailData = new Native.SP_DEVICE_INTERFACE_DETAIL_DATA();
Marshal.StructureToPtr(detailData, buffer, false);
if (!Native.SetupDiGetDeviceInterfaceDetail(_deviceInfoSet, interfaceData, buffer, size, ref size, devData))
{
Exception ex = Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error());
Logger.Log(LogLevel.Error, ex);
throw ex;
}
IntPtr pDevicePath = new IntPtr(buffer.ToInt64() + Marshal.SizeOf(typeof(int)));
return(Marshal.PtrToStringAuto(pDevicePath));
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}