internal static extern bool SetupDiEnumDeviceInterfaces(IntPtr DeviceInfoSet, IntPtr DeviceInfoData, ref Guid InterfaceClassGuid, int MemberIndex, ref DeviceManagement.SP_DEVICE_INTERFACE_DATA DeviceInterfaceData);
internal static extern bool SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, ref DeviceManagement.SP_DEVICE_INTERFACE_DATA DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, int DeviceInterfaceDetailDataSize, ref int RequiredSize, IntPtr DeviceInfoData);
internal eReturn EnumerateDevices(Guid geneaGuid, List <string> devicePathName)
{
int RequiredSize = 0;
IntPtr num = IntPtr.Zero;
IntPtr DeviceInfoSet = new IntPtr();
bool flag1 = false;
DeviceManagement.SP_DEVICE_INTERFACE_DATA DeviceInterfaceData = new DeviceManagement.SP_DEVICE_INTERFACE_DATA();
bool flag2 = false;
eReturn eReturn1 = eReturn.FAILURE;
eReturn eReturn2;
try
{
DeviceInfoSet = DeviceManagement.SetupDiGetClassDevs(ref geneaGuid, IntPtr.Zero, IntPtr.Zero, 18);
eReturn2 = eReturn.SUCCESS;
}
catch
{
eReturn2 = eReturn.FAILURE;
}
if (eReturn2 == eReturn.SUCCESS)
{
eReturn1 = eReturn.FAILURE;
int MemberIndex = 0;
try
{
DeviceInterfaceData.cbSize = Marshal.SizeOf <DeviceManagement.SP_DEVICE_INTERFACE_DATA>(DeviceInterfaceData);
eReturn2 = eReturn.SUCCESS;
}
catch
{
eReturn2 = eReturn.FAILURE;
}
if (eReturn2 == eReturn.SUCCESS)
{
eReturn1 = eReturn.FAILURE;
do
{
try
{
flag2 = DeviceManagement.SetupDiEnumDeviceInterfaces(DeviceInfoSet, IntPtr.Zero, ref geneaGuid, MemberIndex, ref DeviceInterfaceData);
eReturn2 = eReturn.SUCCESS;
}
catch
{
eReturn2 = eReturn.FAILURE;
}
if (eReturn2 == eReturn.SUCCESS)
{
eReturn2 = eReturn.FAILURE;
if (!flag2)
{
flag1 = true;
}
else
{
try
{
flag2 = DeviceManagement.SetupDiGetDeviceInterfaceDetail(DeviceInfoSet, ref DeviceInterfaceData, IntPtr.Zero, 0, ref RequiredSize, IntPtr.Zero);
num = Marshal.AllocHGlobal(RequiredSize);
Marshal.WriteInt32(num, IntPtr.Size == 4 ? 4 + Marshal.SystemDefaultCharSize : 8);
flag2 = DeviceManagement.SetupDiGetDeviceInterfaceDetail(DeviceInfoSet, ref DeviceInterfaceData, num, RequiredSize, ref RequiredSize, IntPtr.Zero);
eReturn2 = eReturn.SUCCESS;
}
catch
{
eReturn2 = eReturn.FAILURE;
}
if (eReturn2 == eReturn.SUCCESS)
{
eReturn2 = eReturn.FAILURE;
if (flag2)
{
IntPtr ptr = new IntPtr(num.ToInt32() + 4);
devicePathName.Add(Marshal.PtrToStringAuto(ptr));
}
}
}
}
++MemberIndex;
}while (!flag1);
}
if (num != IntPtr.Zero)
{
Marshal.FreeHGlobal(num);
}
if (DeviceInfoSet != IntPtr.Zero)
{
try
{
DeviceManagement.SetupDiDestroyDeviceInfoList(DeviceInfoSet);
eReturn2 = eReturn.SUCCESS;
}
catch
{
eReturn2 = eReturn.FAILURE;
}
}
if (flag1)
{
eReturn2 = eReturn.SUCCESS;
}
}
return(eReturn2);
}