1、c++调用outlook的com组件登录邮箱，2、获取收件箱的邮件

可以使用C++的COM技术调用Outlook的COM接口来实现登录邮箱并获取收件箱的邮件。

以下是一个简单的示例代码：

#include <windows.h>
#include <iostream>
#include <comutil.h>
#include <atlbase.h>
#include <ole2.h>

using namespace std;

int main()
{
    HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
    if (FAILED(hr))
    {
        cout << "CoInitializeEx() failed: " << hr << endl;
        return -1;
    }

    IDispatch* pOutlookApp = NULL;
    hr = CoCreateInstance(CLSID_Application, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void**)&pOutlookApp);
    if (FAILED(hr))
    {
        cout << "CoCreateInstance() failed: " << hr << endl;
        CoUninitialize();
        return -1;
    }

    IDispatch* pNamespace = NULL;
    hr = pOutlookApp->GetNamespace("MAPI", &pNamespace);
    if (FAILED(hr))
    {
        cout << "GetNamespace() failed: " << hr << endl;
        pOutlookApp->Release();
        CoUninitialize();
        return -1;
    }

    IDispatch* pSession = NULL;
    hr = pNamespace->Logon("", "", VARIANT_TRUE, VARIANT_TRUE, &pSession);
    if (FAILED(hr))
    {
        cout << "Logon() failed: " << hr << endl;
        pNamespace->Release();
        pOutlookApp->Release();
        CoUninitialize();
        return -1;
    }

    IDispatch* pInboxFolder = NULL;
    hr = pNamespace->GetDefaultFolder(olFolderInbox, &pInboxFolder);
    if (FAILED(hr))
    {
        cout << "GetDefaultFolder() failed: " << hr << endl;
        pSession->Logoff();
        pNamespace->Release();
        pOutlookApp->Release();
        CoUninitialize();
        return -1;
    }

    long count;
    hr = pInboxFolder->get_Items()->get_Count(&count);
    if (FAILED(hr))
    {
        cout << "get_Count() failed: " << hr << endl;
        pInboxFolder->Release();
        pSession->Logoff();
        pNamespace->Release();
        pOutlookApp->Release();
        CoUninitialize();
        return -1;
    }

    cout << "Number of emails: " << count << endl;

    pInboxFolder->Release();
    pSession->Logoff();
    pNamespace->Release();
    pOutlookApp->Release();
    CoUninitialize();

    return 0;
}

需要注意的是，需要先引入头文件`<comutil.h>`和`<atlbase.h>`，并且需要链接`Ole32.lib`和`OleAut32.lib`库文件。另外，上述代码只是一个简单的示例，需要根据实际情况进行修改和扩展。