Without entering into too much details, I want to workaround a bug I’m having in Windows 10.
Through a debugging session in Windbg, I found that I need to call dsreg!DsrCmdCleanupAccountsHelper::CleanupAccounts

This is a system library and I don’t have the .lib.
I would like to call this function in C#.
I know how to Pinvoke functions. The difficulty is that it is inside a Class and it seams to be a static function (not 100% sure yet) and I don’t find the correct syntax

    [DllImport("dsreg.dll", SetLastError = true)]
    static extern Int32 CleanupAccount();

Obviously, this does not work because it’s inside a class.

Then I try to use LoadLibrary and GetProcAddress.

  // Load the DLL
    IntPtr hModule = LoadLibrary("dsreg.dll");
    if (hModule == IntPtr.Zero)
    {
        throw new Exception("Failed to load DLL.");
    }

    // Get the function address using the mangled name
    IntPtr pFunction = GetProcAddress(hModule, "DsrCmdCleanupAccountsHelper::CleanupAccount"); 

Again,this does not work.

Then I try to create a Cpp wrapper:

.h File

#ifdef __cplusplus
extern "C" {
#endif
extern __declspec(dllexport) DsrCmdCleanupAccountsHelper* CreateClassName();
extern __declspec(dllexport) void DisposeClassName(DsrCmdCleanupAccountsHelper* a_pObject);
extern __declspec(dllexport) void CleanupAccount(DsrCmdCleanupAccountsHelper* a_pObject);
#ifdef __cplusplus
}
#endif

cpp File:

#include "pch.h"
#include "DllWrapper.h"

DsrCmdCleanupAccountsHelper* CreateClassName()
{
    return new DsrCmdCleanupAccountsHelper();
}

void DisposeClassName(DsrCmdCleanupAccountsHelper* a_pObject)
{
if (a_pObject != NULL)
{
    delete a_pObject;
    a_pObject = NULL;
}
}

void CleanupAccount(DsrCmdCleanupAccountsHelper* a_pObject)
{
    if (a_pObject != NULL)
    {
        a_pObject->CleanupAccount();
    }
}

Now the problem is that I don’t have the lib and therefore, it raises unresolved external symbols.