Elevating process produces a shell (2 total) but want only 1 total? - c++

Question

Following my previous question here, now I get two shells - one parent (not elevated), and a child shell (elevated). What does one need to do to the code to have instead one shell only that's elevated? E.g. how about somehow closing the parent process?
BOOL IsAppRunningAsAdminMode()
{
BOOL fIsRunAsAdmin = FALSE;
DWORD dwError = ERROR_SUCCESS;
PSID pAdministratorsGroup = NULL;
// Allocate and initialize a SID of the administrators group.
SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
if (!AllocateAndInitializeSid(
&NtAuthority,
2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0,
&pAdministratorsGroup))
{
dwError = GetLastError();
goto Cleanup;
}
// Determine whether the SID of administrators group is enabled in
// the primary access token of the process.
if (!CheckTokenMembership(NULL, pAdministratorsGroup, &fIsRunAsAdmin))
{
dwError = GetLastError();
goto Cleanup;
}
Cleanup:
// Centralized cleanup for all allocated resources.
if (pAdministratorsGroup)
{
FreeSid(pAdministratorsGroup);
pAdministratorsGroup = NULL;
}
// Throw the error if something failed in the function.
if (ERROR_SUCCESS != dwError)
{
throw dwError;
}
return fIsRunAsAdmin;
}
int main() {
bool fIsRunAsAdmin = IsAppRunningAsAdminMode();
if (fIsRunAsAdmin == false)
{
wchar_t szPath[MAX_PATH];
if (GetModuleFileName(NULL, szPath, ARRAYSIZE(szPath)))
{
// Launch itself as admin
SHELLEXECUTEINFO sei = { sizeof(sei) };
sei.lpVerb = L"runas";
sei.lpFile = szPath;
sei.hwnd = NULL;
sei.nShow = SW_NORMAL;
if (!ShellExecuteEx(&sei))
{
DWORD dwError = GetLastError();
if (dwError == ERROR_CANCELLED)
{
// The user refused to allow privileges elevation.
std::cout << "User did not allow elevation" << std::endl;
}
}
}
}
else {
//do nothing since process already elevated
}
//other code following omitted