C++ send HTML email through Outlook - c++

Question

[objective]
Basic C++ console application needs to be able to send HTML emails through Outlook 2007 (which runs minimized) - attachments are not necessary. This method works with plain text and I'm not sure if it can be modified to fit the requirements of HTML. I read somewhere that perhaps you could reference an attachment and it would become the body. I'm just not sure what to do next. Suggestions?
[what I have so far]
BOOL SendMail(CHAR *lpszFrom, CHAR *lpszTo, CHAR *lpszSubject, CHAR *lpszMessage)
{
BOOL bSent = FALSE;
HINSTANCE hMAPI = ::LoadLibrary(_T("mapi32.dll"));
if(0==hMAPI) return bSent;
typedef ULONG (FAR PASCAL *PFN_MAPILogon)(ULONG,LPTSTR,LPTSTR,FLAGS,ULONG,LPLHANDLE);
typedef ULONG (FAR PASCAL *PFN_MAPISendMail)(LHANDLE,ULONG,lpMapiMessage,FLAGS,ULONG);
typedef ULONG (FAR PASCAL *PFN_MAPILogoff)(LHANDLE,ULONG,FLAGS,ULONG);
PFN_MAPILogon MAPILogon = (PFN_MAPILogon)::GetProcAddress(hMAPI,"MAPILogon");
PFN_MAPISendMail MAPISendMail = (PFN_MAPISendMail)::GetProcAddress(hMAPI,"MAPISendMail");
PFN_MAPILogoff MAPILogoff = (PFN_MAPILogoff)::GetProcAddress(hMAPI,"MAPILogoff");
const BOOL bFunctionsLoaded = (0!=MAPILogon)&&(0!=MAPISendMail)&&(0!=MAPILogoff);
ASSERT(bFunctionsLoaded);
if(bFunctionsLoaded)
{
LHANDLE session = 0;
VERIFY(SUCCESS_SUCCESS==MAPILogon(0,0,0,MAPI_NEW_SESSION,0,&session));
ASSERT(0!=session);
MapiRecipDesc recipient;
::ZeroMemory(&recipient,sizeof(recipient));
recipient.ulRecipClass = MAPI_TO;
recipient.lpszName = lpszTo;
MapiMessage message;
::ZeroMemory(&message,sizeof(message));
message.lpszSubject = lpszSubject;
message.lpszNoteText = lpszMessage;
message.nRecipCount = 1;
message.lpRecips = &recipient;
bSent = SUCCESS_SUCCESS == MAPISendMail(session,0,&message,0,0);
VERIFY(SUCCESS_SUCCESS==MAPILogoff(session,0,0,0));
}
::FreeLibrary(hMAPI);
return bSent;
}
Called by...
SendMail("from","to","subject","body");

Answer 1

It looks like MAPI isn't suited for HTML emails.
http://support.microsoft.com/kb/268440
I've sent HTML emails through MFC but that isn't MAPI.

Answer 2

I was sending an requiring the same thing - i found that attaching an html file would result in the html file being used in the body of the email.
the code below was found on this site ( somewhere ) and it works great.
code
bool SendMail(HWND hWndParent, std::string strAttachmentFileName, std::string strSubject,std::string& err)
{
// The attachment must exist as a file on the system
// or MAPISendMail will fail, so......
if (strAttachmentFileName.empty())
return false;
// You may want to remove this check, but if a valid
// HWND is passed in, the mail dialog will be made
// modal to it's parent.
//if (!hWndParent || !::IsWindow(hWndParent))
// return false;
HINSTANCE hMAPI = ::LoadLibraryA("MAPI32.DLL");
if (!hMAPI)
return false;
// Grab the exported entry point for the MAPISendMail function
ULONG (PASCAL *SendMail)(ULONG, ULONG_PTR,
MapiMessage*, FLAGS, ULONG);
(FARPROC&)SendMail = GetProcAddress(hMAPI,
"MAPISendMail");
if (!SendMail)
return false;
// TCHAR szFileName[_MAX_PATH];
// TCHAR szPath[_MAX_PATH];
// TCHAR szSubject[_MAX_PATH];
// ::strcpy(&szFileName[0], strAttachmentFileName.c_str());
// ::strcpy(&szPath[0], strAttachmentFileName.c_str());
// ::strcpy(&szSubject[0], strSubject.c_str());
MapiFileDesc fileDesc;
::ZeroMemory(&fileDesc, sizeof(fileDesc));
fileDesc.nPosition = (ULONG)-1;
fileDesc.lpszPathName = (char *)strAttachmentFileName.c_str();
fileDesc.lpszFileName = (char *)strAttachmentFileName.c_str();
MapiMessage message;
::ZeroMemory(&message, sizeof(message));
message.lpszSubject = (char *)strSubject.c_str();//&szSubject[0];//szSubject;
message.nFileCount = 1;
message.lpFiles = &fileDesc;
// Ok to send
int nError = SendMail(0, (ULONG_PTR)hWndParent,
&message, MAPI_LOGON_UI|MAPI_DIALOG, 0);
if (nError != SUCCESS_SUCCESS &&
nError != MAPI_USER_ABORT &&
nError != MAPI_E_LOGIN_FAILURE)
err = "error";
return false;
err="ok";
return true;
}