Why CoCreateInstance can't create an instance of my component? - c++

Question

I am learning COM through the book "Inside COM" of Dale Rogerson. I try to register my component in the registry and then through this info create an instance of my component in the code of my client. But I see ::FormatMessage function writes this: Class not registered. So, ::CoCreateInstance can't create an instance of my component.
My REG-file:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\CLSID\{68584B56-9224-4DCC-AD35-1070CC9B8FDE}]
#="bush_component_01"
[HKEY_CLASSES_ROOT\CLSID\{68584B56-9224-4DCC-AD35-1070CC9B8FDE}\InprocServer32]
#="D:\\projects\\com_sandbox_solution_01\\Debug\\bush_component_01.dll"
[HKEY_CLASSES_ROOT\CLSID\{EB4BFC91-6A6E-43D1-B4CD-7A5DF24DB8D8}]
#="IID_IX"
[HKEY_CLASSES_ROOT\CLSID\{EB4BFC91-6A6E-43D1-B4CD-7A5DF24DB8D8}\InprocServer32]
#="D:\\projects\\com_sandbox_solution_01\\Debug\\bush_component_01.dll"
Piece of code of my client:
...
// GUID of my DLL (it registered in registry (look at my REG-code above))
// {68584B56-9224-4DCC-AD35-1070CC9B8FDE}
static const CLSID CLSID_component_01 =
{ 0x68584b56, 0x9224, 0x4dcc, { 0xad, 0x35, 0x10, 0x70, 0xcc, 0x9b, 0x8f, 0xde } };
// GUID of my some interface (it registered in registry (look at my REG-code above))
// {EB4BFC91-6A6E-43D1-B4CD-7A5DF24DB8D8}
static const IID IID_IX =
{ 0xeb4bfc91, 0x6a6e, 0x43d1, { 0xb4, 0xcd, 0x7a, 0x5d, 0xf2, 0x4d, 0xb8, 0xd8 } };
...
// Code of my client:
::CoInitialize(nullptr);
IUnknown* comp = nullptr;
HRESULT hcri = ::CoCreateInstance(CLSID_component_01, nullptr,
CLSCTX_INPROC_SERVER, IID_IX, (void**)&comp);
if (FAILED(hcri)){
void* msg = nullptr;
::FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
nullptr, hcri, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&msg, 0,
nullptr);
trace("***** TRACE *****");
trace((LPTSTR)msg);
trace("****************");
keep_window_open();
return 1;
}
// But ::FormatMessage function writes this: Class not registered
Why does it happen?

Answer 1

In 64-bit Windows 32-bit applications should use Wow6432Node registry subkey (in terms of 64-bit regedit).
Unfortunately 32-bit book does not cover that.