C / C++ / MFC

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <tchar.h>
#include <psapi.h>
#include<oleacc.h>
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
#import "libid:00020813-0000-0000-C000-000000000046" auto_search no_dual_interfaces \
	rename("DialogBox", "excelDialogBox") \
	rename("RGB", "excelRGB") \
	rename("DocumentProperties", "excelDocumentProperties") \
	rename("SearchPath", "excelSearchPath") \
	rename("CopyFile", "excelCopyFile") \
	rename("ReplaceText", "excelReplaceText")
 
int _tmain(int argc, _TCHAR* argv[])
{
 // Get the list of process identifiers.
    DWORD aProcesses[1024], cbNeeded, cProcesses;
    unsigned int i;

    if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
        return 1;

    // Calculate how many process identifiers were returned.
    cProcesses = cbNeeded / sizeof(DWORD);
	  
    // Print the name and process identifier for each process.
    for ( i = 0; i < cProcesses; i++ )
	{
        if( aProcesses[i] != 0 )
		{
			TCHAR szProcessName[MAX_PATH] = _T("<unknown>");
			HWND hwnd;
			// Get a handle to the process.
			HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, aProcesses[i] );

			// Get the process name.
			if (NULL != hProcess )
			{
				HMODULE hMod;
				DWORD cbNeeded;
	        
				if ( EnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded) )
				{
					GetModuleBaseName( hProcess, hMod, szProcessName, sizeof(szProcessName)/sizeof(TCHAR) );
  
					if(_wcsicmp(szProcessName,L"EXCEL.EXE") == 0)		 
					{
						std::cout<< szProcessName << "--" << aProcesses[i] <<endl;
						Excel::Window* pWindow = NULL;
                                                //getting failed in the below line.
						HRESULT hr = AccessibleObjectFromWindow(hwnd, OBJID_NATIVEOM, __uuidof(Excel::Window), (void**)&pWindow);

						if (hr == S_OK)
						{
						}
						else
						{
							std::cout<<"Failed";
						}  
					}
				}
			}

			// Print the process name and identifier.
			_tprintf( TEXT("%s  (PID: %u)\n"), szProcessName, aProcesses[i] ); 
			CloseHandle( hProcess );
		}
	} 
	return 0;
}