Eject SSD drive from C# code

Question

I have been trying to remove an SSD drive from C# code. I can eject USB drive but doesn't with SSD drive
Found a WinAPI call CM_Request_Device_Eject, however I am having trouble getting it to work.

Please find the code snippet

Unicode implemetation :

        [DllImport("setupapi.dll")]
        static extern int CM_Request_Device_Eject(
            int dnDevInst,
            out PNP_VETO_TYPE pVetoType,
            StringBuilder pszVetoName,
            int ulNameLength,
            int ulFlags);

        [DllImport("setupapi.dll", EntryPoint = "CM_Request_Device_Eject")]
        static extern int CM_Request_Device_Eject_NoUi(
            int dnDevInst,
            IntPtr pVetoType,
            StringBuilder pszVetoName,
            int ulNameLength,
            int ulFlags);

Method call :

int r = CM_Request_Device_Eject_NoUi(DevInstParent, IntPtr.Zero, null, 0, 0);

If anyone can help me with a code snippet or guide me in the right direction it would be very appreciated.

Answer 1

It is the same question as Eject SSD from c++ code
The OP said that the method with CM_Request_Device_Eject did not work, but the one I posted with HotPlugEjectDevice worked
(P/Invoke in C#)

Answer 2

Thanks for the reply. I tried above mentioned link, I’m able to run successfully in C++ but doesn't with C#. can you please suggest what I missing here.

[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate object HPED(IntPtr hWnd, string DeviceInstanceId, uint dwFlags);

    static void Main(string[] args)
    {

     IntPtr hDLL = LoadLibrary(@"c:\\Windows\\System32\\HotPlug.dll");
     HPED HotPlugEjectDevice = null;

        if (hDLL != null)
        {
            IntPtr s =GetProcAddress(hDLL, "HotPlugEjectDevice");
            if (HotPlugEjectDevice != null)
            {
                object obj= HotPlugEjectDevice(IntPtr.Zero, @"SCSI\\DISK&VEN_&PROD_MTFDDAK256TDL\\4&3118ADCB&0&010000", 0);

            }
        }

        bool result = FreeLibrary(hDLL);       

        Console.WriteLine(result);
    }