c++ - 如何以编程方式发送电子邮件，就像我在 Windows 资源管理器中发送 "Send To Mail Recipient"一样？

Question

ShellExecute() 允许我执行简单的 shell 任务，让系统负责打开或打印文件。我想采用类似的方法以编程方式发送电子邮件附件。

我不想直接操作 Outlook，因为我不想假设用户默认使用哪个电子邮件客户端。我不想直接发送电子邮件，因为我希望用户有机会使用他们喜欢的客户端编写电子邮件正文。因此，当我右键单击一个文件并选择发送到 -> 邮件收件人时，我真的很想完成 Windows 资源管理器所做的事情。

我正在寻找 C++ 解决方案。

Answer 1

这是我的 MAPI 解决方案:

#include <tchar.h>
#include <windows.h>
#include <mapi.h>
#include <mapix.h>

int _tmain( int argc, wchar_t *argv[] )
{
    HMODULE hMapiModule = LoadLibrary( _T( "mapi32.dll" ) );

    if ( hMapiModule != NULL )
    {
        LPMAPIINITIALIZE lpfnMAPIInitialize = NULL;
        LPMAPIUNINITIALIZE lpfnMAPIUninitialize = NULL;
        LPMAPILOGONEX lpfnMAPILogonEx = NULL;
        LPMAPISENDDOCUMENTS lpfnMAPISendDocuments = NULL;
        LPMAPISESSION lplhSession = NULL;

        lpfnMAPIInitialize = (LPMAPIINITIALIZE)GetProcAddress( hMapiModule, "MAPIInitialize" );
        lpfnMAPIUninitialize = (LPMAPIUNINITIALIZE)GetProcAddress( hMapiModule, "MAPIUninitialize" );
        lpfnMAPILogonEx = (LPMAPILOGONEX)GetProcAddress( hMapiModule, "MAPILogonEx" );
        lpfnMAPISendDocuments = (LPMAPISENDDOCUMENTS)GetProcAddress( hMapiModule, "MAPISendDocuments" );

        if ( lpfnMAPIInitialize && lpfnMAPIUninitialize && lpfnMAPILogonEx && lpfnMAPISendDocuments )
        {
            HRESULT hr = (*lpfnMAPIInitialize)( NULL );

            if ( SUCCEEDED( hr ) )
            {
                hr = (*lpfnMAPILogonEx)( 0, NULL, NULL, MAPI_EXTENDED | MAPI_USE_DEFAULT, &lplhSession );

                if ( SUCCEEDED( hr ) )
                {
                    // this opens the email client with "C:\attachment.txt" as an attachment
                    hr = (*lpfnMAPISendDocuments)( 0, ";", "C:\\attachment.txt", NULL, NULL );

                    if ( SUCCEEDED( hr ) )
                    {
                        hr = lplhSession->Logoff( 0, 0, 0 );
                        hr = lplhSession->Release();
                        lplhSession = NULL;
                    }
                }
            }

            (*lpfnMAPIUninitialize)();
        }

        FreeLibrary( hMapiModule );
    }

    return 0;
}