public static ReadOnlyCollection <USBController> GetHostControllers()
{
List <USBController> list = new List <USBController>();
Guid guid = new Guid("3abf6f2d-71c4-462a-8a92-1e6861e6af27");
IntPtr deviceInfoSet = Acer_USB_Library.SetupDiGetClassDevs(ref guid, 0, IntPtr.Zero, 18);
if (deviceInfoSet.ToInt32() != -1)
{
IntPtr intPtr = Marshal.AllocHGlobal(2048);
int num = 0;
bool flag;
do
{
USBController uSBController = new USBController();
uSBController.ControllerIndex = num;
SP_DEVICE_INTERFACE_DATA structure = default(SP_DEVICE_INTERFACE_DATA);
structure.cbSize = Marshal.SizeOf(structure);
flag = Acer_USB_Library.SetupDiEnumDeviceInterfaces(deviceInfoSet, IntPtr.Zero, ref guid, num, ref structure);
if (flag)
{
SP_DEVINFO_DATA structure2 = default(SP_DEVINFO_DATA);
structure2.cbSize = Marshal.SizeOf(structure2);
SP_DEVICE_INTERFACE_DETAIL_DATA sP_DEVICE_INTERFACE_DETAIL_DATA = default(SP_DEVICE_INTERFACE_DETAIL_DATA);
sP_DEVICE_INTERFACE_DETAIL_DATA.cbSize = 4 + Marshal.SystemDefaultCharSize;
int num2 = 0;
int deviceInterfaceDetailDataSize = 2048;
if (Acer_USB_Library.SetupDiGetDeviceInterfaceDetail(deviceInfoSet, ref structure, ref sP_DEVICE_INTERFACE_DETAIL_DATA, deviceInterfaceDetailDataSize, ref num2, ref structure2))
{
uSBController.ControllerDevicePath = sP_DEVICE_INTERFACE_DETAIL_DATA.DevicePath;
int num3 = 0;
int num4 = 1;
if (Acer_USB_Library.SetupDiGetDeviceRegistryProperty(deviceInfoSet, ref structure2, 0, ref num4, intPtr, 2048, ref num3))
{
uSBController.ControllerDeviceDesc = Marshal.PtrToStringAuto(intPtr);
}
if (Acer_USB_Library.SetupDiGetDeviceRegistryProperty(deviceInfoSet, ref structure2, 9, ref num4, intPtr, 2048, ref num3))
{
uSBController.ControllerDriverKeyName = Marshal.PtrToStringAuto(intPtr);
}
}
list.Add(uSBController);
}
num++;
}while (flag);
Marshal.FreeHGlobal(intPtr);
Acer_USB_Library.SetupDiDestroyDeviceInfoList(deviceInfoSet);
}
return(new ReadOnlyCollection <USBController>(list));
}
private static string GetInstanceIDByKeyName(string DriverKeyName)
{
string result = "";
string enumerator = "USB";
IntPtr deviceInfoSet = Acer_USB_Library.SetupDiGetClassDevs(0, enumerator, IntPtr.Zero, 6);
if (deviceInfoSet.ToInt32() != -1)
{
IntPtr intPtr = Marshal.AllocHGlobal(2048);
int num = 0;
bool flag;
do
{
SP_DEVINFO_DATA structure = default(SP_DEVINFO_DATA);
structure.cbSize = Marshal.SizeOf(structure);
flag = Acer_USB_Library.SetupDiEnumDeviceInfo(deviceInfoSet, num, ref structure);
if (flag)
{
int num2 = 0;
int num3 = 1;
string a = "";
if (Acer_USB_Library.SetupDiGetDeviceRegistryProperty(deviceInfoSet, ref structure, 9, ref num3, intPtr, 2048, ref num2))
{
a = Marshal.PtrToStringAuto(intPtr);
}
if (a == DriverKeyName)
{
int num4 = 2048;
StringBuilder stringBuilder = new StringBuilder(num4);
Acer_USB_Library.SetupDiGetDeviceInstanceId(deviceInfoSet, ref structure, stringBuilder, num4, out num2);
result = stringBuilder.ToString();
break;
}
}
num++;
}while (flag);
Marshal.FreeHGlobal(intPtr);
Acer_USB_Library.SetupDiDestroyDeviceInfoList(deviceInfoSet);
}
return(result);
}