Can a Microsoft Developer answer my previous question about 64-bit call thru a COM.exe to a 32-bit DLL?

// Client.cpp
//
//		Client calls Server - 64-bit App to 32-bit Service
//
#include <iostream>
#include <iomanip>
using namespace std;
 
#include <objbase.h>
#include "..\AAServer\AAServer_i.h"
 
IAAGetSet* pGetSet;
 
int main()
{
	cout << "\tAClient built in " << 8*sizeof(int*) << "-bit mode." << endl << endl;
 
	HRESULT hr = 0;
 
	hr = CoInitialize(NULL);
	if (FAILED(hr))
	{
		cout << "CoInitialize failed: " << hex << hr << endl;
		exit(0);
	}
 
	hr = CoCreateInstance(CLSID_AAServe, NULL, CLSCTX_LOCAL_SERVER, IID_IAAGetSet, (LPVOID*) &pGetSet);  // Surrogate fails
 
	if (FAILED(hr))
	{
		cout << "CoCreateInstance failed: " << hex << hr << endl;
		exit(0);
	}
 
	hr = pGetSet->Set(1234);
	if (FAILED(hr))
	{
		cout << "Set failed: " << hex << hr << endl;
		pGetSet->Release();
		exit(0);
	}
 
	long a = 0;
 
	hr = pGetSet->Get(&a);
	if (FAILED(hr))
	{
		cout << "Get failed: " << hex << hr << endl;
		exit(0);
	}
 
	cout << "Value: " << a << endl;
 
	pGetSet->Release();
 
	CoUninitialize();
 
	return 0;
}
 
///////////////////////////////////////////////////////////////////////////////////////////////////
 
// AAServer.cpp : Implementation of WinMain
 
 
#include "stdafx.h"
#include "resource.h"
#include "AAServer_i.h"
 
 
class CAAServerModule : public CAtlExeModuleT< CAAServerModule >
{
public :
	DECLARE_LIBID(LIBID_AAServerLib)
	DECLARE_REGISTRY_APPID_RESOURCEID(IDR_AASERVER, "{7E7AFADF-7878-4BCD-8A15-F9ECD4C2F9E6}")
};
 
CAAServerModule _AtlModule;
 
 
 
//
extern "C" int WINAPI _tWinMain(HINSTANCE /*hInstance*/, HINSTANCE /*hPrevInstance*/, 
                                LPTSTR /*lpCmdLine*/, int nShowCmd)
{
    return _AtlModule.WinMain(nShowCmd);
}
 
// AAServer.cpp : Implementation of CAAServer
 
#include "stdafx.h"
#include "AAServer.h"
 
 
// CAAServer
 
 
STDMETHODIMP CAAServer::Set(LONG a)
{
	val = a;
 
	return S_OK;
}
 
STDMETHODIMP CAAServer::Get(LONG* a)
{
	*a = val;
 
	return S_OK;
}
 
 
 
////////////////////////////////////////////////////////////////////////////////////////////////
 
The error code returned by the call to CoCreateInstance is 80040154 (Class not registered.)
 
OLE/COM Object Viewer shows:
 
AAServe Class
CLSID =
  {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48}
   {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48} [AppID] = {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48}
 
    LocalServer32 = "c:\Ed\x64\AAServer\Debug\AAServer.exe"
    ProgID = AAServer.ASAServ.1
    TypeLib = {EF9BF824-30CC-4C03-4C03-9E8C-A59EF4F36347}
    VersionIndependentProgID = AAServer.AAServe
AppID
  {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48} [<no name>] = AAServe Class
  {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48} [DllSurrogate] =
AAServer.AAServer.1 = AAServe Class
  CLSID = {4CD59D98-6F6F-45E9-9B9A-04F49B17DF48}
TypeLib =
  {EF9BF824-30CC-4C03-9E8C-A59EF4F36347}
    1.0 = AAServer 1.0 Type Library
      0
        win32 = c:\Ed\xc64\AAServer\Debug\AAServer.exe
      FLAGS = 0
      HELPDIR = c:\Ed\x64\AAServer\Debug
 
This appears to be a problem in the Registry search. The 32-bit server must be properly registered because the 32-bit client finds it and the program works. The 64-bit compile mode for the server does not find the 32-bit server EXE.
                                              

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101:
102:
103:
104:
105:
106:
107:
108:
109:
110:
111:
112:
113:
114:
115:
116:
117:
118:
119:
120:
121:
122:
123:
124:
125:
126:
127:
128:
129:
130:
131:
132:
133:
134:
135:
136:
137:
138:
139:
140:
141:
142: