C# - CoCreateInstance 관련 Inteop 오류 정리

CoCreateInstance의 pinvoke 호출을 다음과 같이 정의해 볼까요?

[DllImport("ole32.dll")]
internal static extern int CoCreateInstance(
    [In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
    [MarshalAs(UnmanagedType.IUnknown)] IntPtr pUnkOuter,
    CLSCTX dwClsCtx,
    [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid,
    [In, Out] ref IntPtr ppv);

using System;
using System.Runtime.InteropServices;

class Program
{
    [Flags]
    internal enum CLSCTX : uint
    {
        INPROC_SERVER = 0x1,
        INPROC_HANDLER = 0x2,
        LOCAL_SERVER = 0x4,
        INPROC_SERVER16 = 0x8,
        REMOTE_SERVER = 0x10,
        INPROC_HANDLER16 = 0x20,
        RESERVED1 = 0x40,
        RESERVED2 = 0x80,
        RESERVED3 = 0x100,
        RESERVED4 = 0x200,
        NO_CODE_DOWNLOAD = 0x400,
        RESERVED5 = 0x800,
        NO_CUSTOM_MARSHAL = 0x1000,
        ENABLE_CODE_DOWNLOAD = 0x2000,
        NO_FAILURE_LOG = 0x4000,
        DISABLE_AAA = 0x8000,
        ENABLE_AAA = 0x10000,
        FROM_DEFAULT_CONTEXT = 0x20000,
        ACTIVATE_32_BIT_SERVER = 0x40000,
        ACTIVATE_64_BIT_SERVER = 0x80000,
        INPROC = INPROC_SERVER | INPROC_HANDLER,
        SERVER = INPROC_SERVER | LOCAL_SERVER | REMOTE_SERVER,
        ALL = SERVER | INPROC_HANDLER
    }

    [DllImport("ole32.dll")]
    internal static extern int CoCreateInstance(
        [In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
        [MarshalAs(UnmanagedType.IUnknown)] IntPtr /* nuint */ pUnkOuter,
        CLSCTX dwClsCtx,
        [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid,
        [In, Out] ref IntPtr ppv);

    public static Guid CLSID_FolderInitHandler = new Guid("469afbdf-084f-4dc9-904f-9e824c48bc37");
    public static Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046");

    static void Main(string[] args)
    {
        IntPtr pUnknown = IntPtr.Zero;

        try
        {
            int hr = CoCreateInstance(CLSID_FolderInitHandler, IntPtr.Zero /* 0 */, CLSCTX.INPROC_SERVER, IID_IUnknown, ref pUnknown);
            Console.WriteLine(hr);
        }
        finally
        {
            if (pUnknown != IntPtr.Zero)
            {
                Marshal.Release(pUnknown);
            }
        }
    }
}

Unhandled Exception: System.Runtime.InteropServices.MarshalDirectiveException: Cannot marshal 'parameter #2': Invalid managed/unmanaged type combination (Int/UInt must be paired with SysInt or SysUInt).
   at Program.CoCreateInstance(Guid rclsid, IntPtr pUnkOuter, CLSCTX dwClsCtx, Guid riid, IntPtr& ppv)
   at Program.Main(String[] args)

[DllImport("ole32.dll")]
internal static extern int CoCreateInstance([In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
    [MarshalAs(UnmanagedType.IUnknown)] object pUnkOuter,
    CLSCTX dwClsCtx, [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid, [In, Out] ref IntPtr ppv);

int hr = CoCreateInstance(CLSID_FolderInitHandler, null, CLSCTX.INPROC_SERVER, IID_IUnknown, ref pUnknown);
Console.WriteLine(hr); // 출력 결과 0

[DllImport("ole32.dll")]
internal static extern int CoCreateInstance([In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
    IntPtr pUnkOuter,
    CLSCTX dwClsCtx, [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid, [In, Out] ref IntPtr ppv);

int hr = CoCreateInstance(CLSID_FolderInitHandler, IntPtr.Zero, CLSCTX.INPROC_SERVER, IID_IUnknown, ref pUnknown);
Console.WriteLine(hr); // 출력 결과 0

[DllImport("ole32.dll")]
internal static extern int CoCreateInstance([In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
    [MarshalAs(UnmanagedType.IUnknown)] object pUnkOuter,
    CLSCTX dwClsCtx, [In, MarshalAs(UnmanagedType.LPStruct)] Guid riid, [In, Out] ref IntPtr ppv);

int hr = CoCreateInstance(CLSID_FolderInitHandler, IntPtr.Zero, CLSCTX.INPROC_SERVER, IID_IUnknown, ref pUnknown);
Console.WriteLine(hr); // 출력 결과: -2147221232

0x80040110 Class does not support aggregation (or class object is remote) 

C# - CoCreateInstance 관련 Inteop 오류 정리
; https://www.sysnet.pe.kr/2/0/12678

Wslhub.Sdk 사용으로 알아보는 CoInitializeSecurity 사용 제약
; https://www.sysnet.pe.kr/2/0/12665

별도 DLL에 포함된 타입을 STAThread Main 메서드에서 사용하는 경우 CoInitializeSecurity 자동 호출
; https://www.sysnet.pe.kr/2/0/12666

COM+ 서버 응용 프로그램을 이용해 CoInitializeSecurity 제약 해결
; https://www.sysnet.pe.kr/2/0/12667

ionescu007/lxss github repo에 공개된 lxssmanager.dll의 CLSID_LxssUserSession/IID_ILxssSession 사용법
; https://www.sysnet.pe.kr/2/0/12676

역공학을 통한 lxssmanager.dll의 ILxssSession 사용법 분석
; https://www.sysnet.pe.kr/2/0/12677

C# - DLL Surrogate를 이용한 Out-of-process COM 개체 제작
; https://www.sysnet.pe.kr/2/0/12668

DLL Surrogate를 이용한 Out-of-process COM 개체에서의 CoInitializeSecurity 문제
; https://www.sysnet.pe.kr/2/0/12670

CoInitializeSecurity의 전역 설정을 재정의하는 CoSetProxyBlanket 함수 사용법
; https://www.sysnet.pe.kr/2/0/12679