public override void Run(SwitchOptions Options)
{
string id = Options.ID.ToLower();
string name = Options.Name.ToLower();
Func <VideoCard, bool> predicate = string.IsNullOrEmpty(id)
? new Func <VideoCard, bool>(x => x.Name.ToLower().Contains(name))
: x => x.ID.ToLower().Contains(id) || id.Contains(x.ID.ToLower());
VideoCard card = VideoCard.EnumerateVideoCards().FirstOrDefault(predicate);
if (card is null)
{
if (!string.IsNullOrEmpty(Options.ID))
{
try
{
SetupAPI.ChangeDeviceState(VideoCard.VideoAdaptersClass, Options.ID, !Options.Disable);
return;
} catch { }
}
PrintException("The specified video card was not found");
}
else
{
try
{
if (Options.Disable)
{
card.Disable();
}
else
{
card.Enable();
}
}
catch (Exception e)
{
PrintException(e);
}
}
}
public static string FindDfrDevice()
{
string instancePath = null;
var bResult = true;
uint i = 0;
var h = SetupAPI.SetupDiGetClassDevs(
ref DfrDisplayInterfaceGuid,
IntPtr.Zero,
IntPtr.Zero,
SetupAPI.DIGCF_PRESENT | SetupAPI.DIGCF_DEVICEINTERFACE
);
if (h != IntPtr.Zero)
{
// https://www.pinvoke.net/default.aspx/setupapi.setupdienumdeviceinterfaces
while (bResult)
{
SP_DEVICE_INTERFACE_DATA dia = new SP_DEVICE_INTERFACE_DATA();
dia.cbSize = (uint)Marshal.SizeOf(dia);
bResult = SetupAPI.SetupDiEnumDeviceInterfaces(h, IntPtr.Zero,
ref DfrDisplayInterfaceGuid, i, dia);
if (bResult)
{
SP_DEVINFO_DATA da = new SP_DEVINFO_DATA();
da.cbSize = (uint)Marshal.SizeOf(da);
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(h, dia, IntPtr.Zero, 0, out uint nRequiredSize, null))
{
// ERROR_INSUFFICIENT_BUFFER
if (Marshal.GetLastWin32Error() != 122)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var deviceInterfaceDetailData = Marshal.AllocHGlobal((int)nRequiredSize);
try
{
Marshal.WriteInt32(deviceInterfaceDetailData,
(IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8);
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(h, dia,
deviceInterfaceDetailData, nRequiredSize, out uint _, null))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
IntPtr pDevicePathName = new IntPtr(deviceInterfaceDetailData.ToInt64() + 4);
return(Marshal.PtrToStringAuto(pDevicePathName));
}
finally
{
Marshal.FreeHGlobal(deviceInterfaceDetailData);
}
}
}
i++;
}
}
return(instancePath);
}
public static InterfaceDetails[] getConnectedDevices()
{
InterfaceDetails[] devices = new InterfaceDetails[0];
//Create structs to hold interface information
SP_DEVINFO_DATA devInfo = new SP_DEVINFO_DATA();
SP_DEVICE_INTERFACE_DATA devIface = new SP_DEVICE_INTERFACE_DATA();
devInfo.cbSize = (uint)Marshal.SizeOf(devInfo);
devIface.cbSize = (uint)(Marshal.SizeOf(devIface));
Guid G = new Guid();
HID.HidD_GetHidGuid(ref G); //Get the guid of the HID device class
IntPtr i = SetupAPI.SetupDiGetClassDevs(ref G, IntPtr.Zero, IntPtr.Zero, SetupAPI.DIGCF_DEVICEINTERFACE | SetupAPI.DIGCF_PRESENT);
//Loop through all available entries in the device list, until false
SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();
if (IntPtr.Size == 8) // for 64 bit operating systems
{
didd.cbSize = 8;
}
else
{
didd.cbSize = 4 + Marshal.SystemDefaultCharSize; // for 32 bit systems
}
int j = -1;
bool b = true;
SafeFileHandle tempHandle;
while (b)
{
++j;
b = SetupAPI.SetupDiEnumDeviceInterfaces(i, IntPtr.Zero, ref G, (uint)j, ref devIface);
if (b == false)
{
break;
}
uint requiredSize = 0;
SetupAPI.SetupDiGetDeviceInterfaceDetail(i, ref devIface, ref didd, 256, out requiredSize, ref devInfo);
string devicePath = didd.DevicePath;
//create file handles using CT_CreateFile
tempHandle = Kernel32.CreateFile(devicePath, Kernel32.GENERIC_READ | Kernel32.GENERIC_WRITE, Kernel32.FILE_SHARE_READ | Kernel32.FILE_SHARE_WRITE,
IntPtr.Zero, Kernel32.OPEN_EXISTING, 0, IntPtr.Zero);
//get capabilites - use getPreParsedData, and getCaps
//store the reportlengths
IntPtr ptrToPreParsedData = new IntPtr();
bool ppdSucsess = HID.HidD_GetPreparsedData(tempHandle, ref ptrToPreParsedData);
if (ppdSucsess == false)
{
continue;
}
HIDP_CAPS capabilities = new HIDP_CAPS();
HID.HidP_GetCaps(ptrToPreParsedData, ref capabilities);
HIDD_ATTRIBUTES attributes = new HIDD_ATTRIBUTES();
HID.HidD_GetAttributes(tempHandle, ref attributes);
string productName = "";
string SN = "";
string manfString = "";
IntPtr buffer = Marshal.AllocHGlobal(126);//max alloc for string;
if (HID.HidD_GetProductString(tempHandle, buffer, 126))
{
productName = Marshal.PtrToStringAuto(buffer);
}
if (HID.HidD_GetSerialNumberString(tempHandle, buffer, 126))
{
SN = Marshal.PtrToStringAuto(buffer);
}
if (HID.HidD_GetManufacturerString(tempHandle, buffer, 126))
{
manfString = Marshal.PtrToStringAuto(buffer);
}
Marshal.FreeHGlobal(buffer);
//Call freePreParsedData to release some stuff
HID.HidD_FreePreparsedData(ref ptrToPreParsedData);
//If connection was sucsessful, record the values in a global struct
InterfaceDetails productInfo = new InterfaceDetails();
productInfo.devicePath = devicePath;
productInfo.manufacturer = manfString;
productInfo.product = productName;
productInfo.PID = (ushort)attributes.ProductID;
productInfo.VID = (ushort)attributes.VendorID;
productInfo.versionNumber = (ushort)attributes.VersionNumber;
productInfo.IN_reportByteLength = (int)capabilities.InputReportByteLength;
productInfo.OUT_reportByteLength = (int)capabilities.OutputReportByteLength;
productInfo.serialNumber = SN; //Check that serial number is actually a number
int newSize = devices.Length + 1;
Array.Resize(ref devices, newSize);
devices[newSize - 1] = productInfo;
}
SetupAPI.SetupDiDestroyDeviceInfoList(i);
return(devices);
}
public void Disable() => SetupAPI.ChangeDeviceState(VideoAdaptersClass, ID, false);
public void Enable() => SetupAPI.ChangeDeviceState(VideoAdaptersClass, ID, true);
/// <summary>
/// Scans the computer for any USB devices matching th specified VID/PID DeviceID.
/// Throws an exception if none are found
/// </summary>
public void Connect()
{
var deviceInterfaceDetailData = new SetupAPI.SP_DEVICE_INTERFACE_DETAIL_DATA();
var deviceInterfaceData = new SetupAPI.SP_DEVICE_INTERFACE_DATA();
var deviceInfoData = new SetupAPI.SP_DEVINFO_DATA();
UInt32 interfaceIndex = 0;
UInt32 dwRegType;
UInt32 dwRegSize;
UInt32 structureSize = 0;
bool matchFound = false;
//First populate a list of plugged in devices (by specifying "DIGCF_PRESENT"), which are of the specified class GUID.
IntPtr pDeviceInfoTable = SetupAPI.SetupDiGetClassDevs(
ref InterfaceClassGuid,
null,
IntPtr.Zero,
SetupAPI.DIGCF_PRESENT | SetupAPI.DIGCF_DEVICEINTERFACE
);
try
{
//Now look through the list we just populated. We are trying to see if any of them match our device.
while (true)
{
deviceInterfaceData.cbSize = (UInt32)Marshal.SizeOf(typeof(SetupAPI.SP_DEVICE_INTERFACE_DATA));
if (!SetupAPI.SetupDiEnumDeviceInterfaces(pDeviceInfoTable, IntPtr.Zero, ref InterfaceClassGuid, interfaceIndex, ref deviceInterfaceData))
{
int error = Marshal.GetLastWin32Error();
if (error == SetupAPI.ERROR_NO_MORE_ITEMS)
{
throw new HidDeviceException(String.Format("No HID devices found matching {0}", this.DeviceId));
}
else
{
throw new Win32Exception(error);
}
}
//Now retrieve the hardware ID from the registry. The hardware ID contains the VID and PID, which we will then
//check to see if it is the correct device or not.
//Initialize an appropriate SP_DEVINFO_DATA structure. We need this structure for SetupDiGetDeviceRegistryProperty().
deviceInfoData.cbSize = (UInt32)Marshal.SizeOf(typeof(SetupAPI.SP_DEVINFO_DATA));
if (!SetupAPI.SetupDiEnumDeviceInfo(pDeviceInfoTable, interfaceIndex, ref deviceInfoData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
//Retrieve the hardware IDs for the current device we are looking at. PropertyValueBuffer gets filled with a
//REG_MULTI_SZ (array of null terminated strings). To find a device, we only care about the very first string in the
//buffer, which will be the "device ID". The device ID is a string which contains the VID and PID, in the example
//format "Vid_04d8&Pid_003f".
String deviceIdFromRegistry = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_HARDWAREID);
if (deviceIdFromRegistry == null)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
//Now check if the first string in the hardware ID matches the device ID of my USB device.
//Convert both strings to lower case. This makes the code more robust/portable across OS Versions
deviceIdFromRegistry = deviceIdFromRegistry.ToLowerInvariant();
var deviceIdToFind = this.DeviceId.ToLowerInvariant();
//Now check if the hardware ID we are looking at contains the correct VID/PID
matchFound = deviceIdFromRegistry.Contains(deviceIdToFind);
if (matchFound == true)
{
//Device must have been found. (Goal: Open read and write handles) In order to do this, we will need the actual device path first.
//We can get the path by calling SetupDiGetDeviceInterfaceDetail(), however, we have to call this function twice: The first
//time to get the size of the required structure/buffer to hold the detailed interface data, then a second time to actually
//get the structure (after we have allocated enough memory for the structure.)
deviceInterfaceDetailData = new SetupAPI.SP_DEVICE_INTERFACE_DETAIL_DATA();
if (IntPtr.Size == 8) // for 64 bit operating systems
{
deviceInterfaceDetailData.cbSize = 8;
}
else
{
deviceInterfaceDetailData.cbSize = (UInt32)(4 + Marshal.SystemDefaultCharSize); // for 32 bit systems
}
UInt32 bufferSize = 1000;
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(pDeviceInfoTable, ref deviceInterfaceData, ref deviceInterfaceDetailData, bufferSize, out structureSize, ref deviceInfoData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
// Finally set the devicePath
this.DevicePath = deviceInterfaceDetailData.DevicePath;
// Also get the device description
this.DeviceDescription = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_FRIENDLYNAME);
if (this.DeviceDescription == null)
{
this.DeviceDescription = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_DEVICEDESC);
}
return;
}
interfaceIndex++;
if (interfaceIndex == 10000000) //Surely there aren't more than 10 million interfaces attached to a single PC.
{
//If execution gets to here, it is probably safe to assume some kind of unanticipated problem occurred.
//In this case, bug out, to avoid infinite blocking while(true) loop.
throw new Exception("Unknown Error in HidDevice.Open()");
}
//Keep looping until we either find a device with matching VID and PID, or until we run out of items, or some error is encountered.
}
}
finally
{
//Clean up the old structure we no longer need.
SetupAPI.SetupDiDestroyDeviceInfoList(pDeviceInfoTable);
}
}
/// <summary>
/// Modifies the device registry entry to use the specified name
/// in the windows device manager.
/// REQUIRES ADMINISTRATOR PRIVILEGE
/// </summary>
/// <param name="name">The name to display in the windows device manager</param>
public void SetFriendlyName(string name)
{
WindowsIdentity identity = WindowsIdentity.GetCurrent();
WindowsPrincipal principal = new WindowsPrincipal(identity);
if (!principal.IsInRole(WindowsBuiltInRole.Administrator))
{
throw new Exception("This function requires administrator privileges");
}
var deviceInterfaceData = new SetupAPI.SP_DEVICE_INTERFACE_DATA();
var deviceInfoData = new SetupAPI.SP_DEVINFO_DATA();
UInt32 interfaceIndex = 0;
// Populate a list of plugged in devices (by specifying "DIGCF_PRESENT"), which are of the specified class GUID.
IntPtr pDeviceInfoTable = SetupAPI.SetupDiGetClassDevs(
ref InterfaceClassGuid,
null,
IntPtr.Zero,
SetupAPI.DIGCF_PRESENT | SetupAPI.DIGCF_DEVICEINTERFACE
);
try
{
while (true)
{
deviceInterfaceData.cbSize = (UInt32)Marshal.SizeOf(typeof(SetupAPI.SP_DEVICE_INTERFACE_DATA));
if (!SetupAPI.SetupDiEnumDeviceInterfaces(pDeviceInfoTable, IntPtr.Zero, ref InterfaceClassGuid, interfaceIndex, ref deviceInterfaceData))
{
int error = Marshal.GetLastWin32Error();
if (error == SetupAPI.ERROR_NO_MORE_ITEMS)
{
return;
}
else
{
throw new Win32Exception(error);
}
}
//Initialize an appropriate SP_DEVINFO_DATA structure. We need this structure for SetupDiGetDeviceRegistryProperty().
deviceInfoData.cbSize = (UInt32)Marshal.SizeOf(typeof(SetupAPI.SP_DEVINFO_DATA));
if (!SetupAPI.SetupDiEnumDeviceInfo(pDeviceInfoTable, interfaceIndex, ref deviceInfoData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
String deviceIdFromRegistry = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_HARDWAREID);
if (deviceIdFromRegistry != null)
{
deviceIdFromRegistry = deviceIdFromRegistry.ToLowerInvariant();;
String deviceIdToFind = this.DeviceId.ToLowerInvariant();
if (deviceIdFromRegistry.Contains(deviceIdToFind))
{
// Set the friendly name that's displayed in the device manager
SetupAPI.SetupDiSetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_FRIENDLYNAME, name);
this.DeviceDescription = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_FRIENDLYNAME);
if (this.DeviceDescription == null)
{
this.DeviceDescription = SetupAPI.SetupDiGetDeviceRegistryProperty(pDeviceInfoTable, ref deviceInfoData, SetupAPI.SPDRP_DEVICEDESC);
}
}
}
interfaceIndex++;
if (interfaceIndex == 10000000) //Surely there aren't more than 10 million interfaces attached to a single PC.
{
return;
}
}
}
finally
{
//Clean up the old structure we no longer need.
SetupAPI.SetupDiDestroyDeviceInfoList(pDeviceInfoTable);
}
}
public static InterfaceDetails[] getConnectedDevices()
{
InterfaceDetails[] devices = new InterfaceDetails[0];
//Create structs to hold interface information
SP_DEVINFO_DATA devInfo = new SP_DEVINFO_DATA();
devInfo.cbSize = (uint)Marshal.SizeOf(devInfo);
SP_DEVICE_INTERFACE_DATA devIface = new SP_DEVICE_INTERFACE_DATA();
devIface.cbSize = (uint)(Marshal.SizeOf(devIface));
Guid G = Guid.Empty;
HID.HidD_GetHidGuid(ref G); //Get the guid of the HID device class
IntPtr deviceInfo = SetupAPI.SetupDiGetClassDevs(ref G, IntPtr.Zero, IntPtr.Zero, SetupAPI.DIGCF_DEVICEINTERFACE | SetupAPI.DIGCF_PRESENT);
//Loop through all available entries in the device list, until false
int j = 0;
while (true)
{
if (!SetupAPI.SetupDiEnumDeviceInterfaces(deviceInfo, IntPtr.Zero, ref G, (uint)j, ref devIface))
{
break;
}
uint requiredSize = 0;
IntPtr detailMemory = Marshal.AllocHGlobal((int)requiredSize);
SP_DEVICE_INTERFACE_DETAIL_DATA functionClassDeviceData = (SP_DEVICE_INTERFACE_DETAIL_DATA)Marshal.PtrToStructure(detailMemory, Typeof <SP_DEVICE_INTERFACE_DETAIL_DATA>());
functionClassDeviceData.cbSize = Marshal.SizeOf(functionClassDeviceData);
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(deviceInfo, ref devIface, ref functionClassDeviceData, requiredSize, out requiredSize, ref devInfo))
{
Marshal.FreeHGlobal(detailMemory);
break;
}
string devicePath = functionClassDeviceData.DevicePath;
Marshal.FreeHGlobal(detailMemory);
//create file handles using CT_CreateFile
uint desiredAccess = Kernel32.GENERIC_READ | Kernel32.GENERIC_WRITE;
uint shareMode = Kernel32.FILE_SHARE_READ | Kernel32.FILE_SHARE_WRITE;
SafeFileHandle tempHandle = Kernel32.CreateFile(devicePath, desiredAccess, shareMode,
IntPtr.Zero, Kernel32.OPEN_EXISTING, 0, IntPtr.Zero);
//get capabilites - use getPreParsedData, and getCaps
//store the reportlengths
IntPtr ptrToPreParsedData = new IntPtr();
bool ppdSucsess = HID.HidD_GetPreparsedData(tempHandle, ref ptrToPreParsedData);
if (!ppdSucsess)
{
continue;
}
HIDP_CAPS capability = new HIDP_CAPS();
HID.HidP_GetCaps(ptrToPreParsedData, ref capability);
HIDD_ATTRIBUTES attributes = new HIDD_ATTRIBUTES();
HID.HidD_GetAttributes(tempHandle, ref attributes);
string productName = EMPTY;
string SN = EMPTY;
string manfString = EMPTY;
const int bufferLen = 128;
IntPtr buffer = Marshal.AllocHGlobal(bufferLen);
if (HID.HidD_GetProductString(tempHandle, buffer, bufferLen))
{
productName = Marshal.PtrToStringAuto(buffer);
}
if (HID.HidD_GetSerialNumberString(tempHandle, buffer, bufferLen))
{
SN = Marshal.PtrToStringAuto(buffer);
}
if (HID.HidD_GetManufacturerString(tempHandle, buffer, bufferLen))
{
manfString = Marshal.PtrToStringAuto(buffer);
}
Marshal.FreeHGlobal(buffer);
//Call freePreParsedData to release some stuff
HID.HidD_FreePreparsedData(ref ptrToPreParsedData);
//If connection was sucsessful, record the values in a global struct
InterfaceDetails productInfo = new InterfaceDetails();
productInfo.devicePath = devicePath;
productInfo.manufacturer = manfString;
productInfo.product = productName;
productInfo.PID = (ushort)attributes.ProductID;
productInfo.VID = (ushort)attributes.VendorID;
productInfo.versionNumber = (ushort)attributes.VersionNumber;
productInfo.IN_reportByteLength = capability.InputReportByteLength;
productInfo.OUT_reportByteLength = capability.OutputReportByteLength;
productInfo.serialNumber = SN; //Check that serial number is actually a number
int newSize = devices.Length + 1;
Array.Resize(ref devices, newSize);
devices[newSize - 1] = productInfo;
++j;
}
SetupAPI.SetupDiDestroyDeviceInfoList(deviceInfo);
return(devices);
}
private static uint GetDrivesDevInstByDeviceNumber(long DeviceNumber, Kernel32.DRIVE_TYPE DriveType)
{
Guid Type_Guid;
switch (DriveType)
{
case Kernel32.DRIVE_TYPE.DRIVE_REMOVABLE:
case Kernel32.DRIVE_TYPE.DRIVE_FIXED:
{
Type_Guid = new Guid(GUID_DEVINTERFACE_DISK);
break;
}
case Kernel32.DRIVE_TYPE.DRIVE_CDROM:
{
Type_Guid = new Guid(GUID_DEVINTERFACE_CDROM);
break;
}
default:
{
throw new ArgumentException("Parameter is invalid", nameof(DriveType));
}
}
using (SetupAPI.SafeHDEVINFO hDevInfo = SetupAPI.SetupDiGetClassDevs(Type_Guid, Flags: SetupAPI.DIGCF.DIGCF_PRESENT | SetupAPI.DIGCF.DIGCF_DEVICEINTERFACE))
{
if (hDevInfo.IsInvalid || hDevInfo.IsNull)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
for (uint Index = 0; ; Index++)
{
SetupAPI.SP_DEVICE_INTERFACE_DATA Interface_Data = new SetupAPI.SP_DEVICE_INTERFACE_DATA
{
cbSize = Convert.ToUInt32(Marshal.SizeOf(typeof(SetupAPI.SP_DEVICE_INTERFACE_DATA)))
};
if (!SetupAPI.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, Type_Guid, Index, ref Interface_Data))
{
int Error = Marshal.GetLastWin32Error();
if (Error != Win32Error.ERROR_NO_MORE_ITEMS)
{
throw new Win32Exception(Error);
}
break;
}
SetupAPI.SP_DEVINFO_DATA devData = new SetupAPI.SP_DEVINFO_DATA
{
cbSize = Convert.ToUInt32(Marshal.SizeOf(typeof(SetupAPI.SP_DEVINFO_DATA)))
};
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(hDevInfo, Interface_Data, IntPtr.Zero, 0, out uint Size, ref devData))
{
int Error = Marshal.GetLastWin32Error();
if (Error != Win32Error.ERROR_INSUFFICIENT_BUFFER)
{
throw new Win32Exception(Error);
}
}
IntPtr Buffer = Marshal.AllocHGlobal(Convert.ToInt32(Size));
try
{
SetupAPI.SP_DEVICE_INTERFACE_DETAIL_DATA Interface_Detail_Data = new SetupAPI.SP_DEVICE_INTERFACE_DETAIL_DATA
{
cbSize = Convert.ToUInt32(Marshal.SizeOf(typeof(SetupAPI.SP_DEVICE_INTERFACE_DETAIL_DATA)))
};
Marshal.StructureToPtr(Interface_Detail_Data, Buffer, false);
if (!SetupAPI.SetupDiGetDeviceInterfaceDetail(hDevInfo, Interface_Data, Buffer, Size, out _, ref devData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
string DevicePath = Marshal.PtrToStringAuto((IntPtr)(Buffer.ToInt64() + Marshal.SizeOf(typeof(int))));
using (Kernel32.SafeHFILE hDrive = Kernel32.CreateFile(DevicePath, 0, FileShare.ReadWrite, null, FileMode.Open, FileFlagsAndAttributes.SECURITY_ANONYMOUS))
{
if (!hDrive.IsInvalid && !hDrive.IsNull && DeviceNumber == GetDeviceNumber(hDrive))
{
return(devData.DevInst);
}
}
}
finally
{
Marshal.FreeHGlobal(Buffer);
}
}
}
return(0);
}
