イグトランスの頭の中（のかけら）

#include <iostream>
#include <windows.h>
#include <shlwapi.h>
#include <roapi.h>
#include <comdef.h>
 
class InitializeSpy : public IInitializeSpy
{
public:
  InitializeSpy() = default;
  InitializeSpy(const InitializeSpy&) = delete;
  InitializeSpy& operator=(const InitializeSpy&) = delete;
  ~InitializeSpy() = default;
 
  IFACEMETHOD(QueryInterface)(
    _In_ REFIID riid, _COM_Outptr_ void** ppv) override
  {
    static const QITAB qit[] = {
      {&__uuidof(IInitializeSpy), OFFSETOFCLASS(IInitializeSpy, InitializeSpy)},
      {},
    };
    return QISearch(this, qit, riid, ppv);
  }
  IFACEMETHOD_(ULONG, AddRef)() override { return 0; }
  IFACEMETHOD_(ULONG, Release)() override { return 0; }
 
  IFACEMETHOD(PreInitialize)(
    _In_ DWORD dwCoInit,
    _In_ DWORD dwCurThreadAptRefs) override
  {
    std::cout << "PreInitialize:    "
      << std::dec << dwCurThreadAptRefs
      << ", dwCoInit: " << std::hex << dwCoInit << std::endl;
    return S_OK;
  }
 
  IFACEMETHOD(PostInitialize)(
    _In_ HRESULT hrCoInit,
    _In_ DWORD dwCoInit,
    _In_ DWORD dwNewThreadAptRefs) override
  {
    std::cout << "PostInitialize:   "
      << std::dec << dwNewThreadAptRefs
      << ", dwCoInit: " << dwCoInit
      << ", hrCoInit: " << std::hex << hrCoInit << std::endl;
    return S_OK;
  }
 
  IFACEMETHOD(PreUninitialize)(
    _In_ DWORD dwCurThreadAptRefs) override
  {
    std::cout << "PreUninitialize:  "
      << std::dec << dwCurThreadAptRefs << std::endl;
    return S_OK;
  }
 
  IFACEMETHOD(PostUninitialize)(
    _In_ DWORD dwNewThreadAptRefs) override
  {
    std::cout << "PostUninitialize: "
      << std::dec << dwNewThreadAptRefs << std::endl;
    return S_OK;
  }
};
 
int main()
{
  try
  {
    InitializeSpy spy;
    ULARGE_INTEGER cookie;
    _com_util::CheckError(CoRegisterInitializeSpy(&spy, &cookie));
 
    std::cout << std::showbase;
 
    std::cout << "---- CoInitialize" << std::endl;
    _com_util::CheckError(CoInitializeEx(
      nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE));
    _com_util::CheckError(CoInitializeEx(
      nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE));
    CoUninitialize();
    CoUninitialize();
 
    std::cout << "---- CoInitialize (failed)" << std::endl;
    _com_util::CheckError(CoInitializeEx(
      nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE));
    _com_util::CheckError(CoInitializeEx(
      nullptr, COINIT_MULTITHREADED | COINIT_DISABLE_OLE1DDE));
    CoUninitialize();
 
    std::cout << "---- OleInitialize" << std::endl;
    OleInitialize(nullptr);
    OleUninitialize();
 
    std::cout << "---- RoInitialize (MTA)" << std::endl;
    RoInitialize(RO_INIT_MULTITHREADED);
    RoUninitialize();
 
    std::cout << "---- RoInitialize (STA)" << std::endl;
    RoInitialize(RO_INIT_SINGLETHREADED);
    RoUninitialize();
 
    _com_util::CheckError(CoRevokeInitializeSpy(cookie));
  }
  catch(const _com_error& e)
  {
    std::cout << std::hex << std::showbase << e.Error() << std::endl;
  }
}