How do I get the Service Display name in C++?

Question

I am trying to get the display name of the running service using c++. I was trying to use the GetServiceDisplayName function but it does not seem to be working, not sure why.

Answer 1

You need to use the WTSSendMessage instead of the MessageBox to interact with the active session.

WTS_SESSION_INFO* pSessionInfo = NULL;          
DWORD dwSessionsCount = 0;
if(WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pSessionInfo, &dwSessionsCount))
{   
    for(int i=0; i<(int)dwSessionsCount; i++)
    {
        WTS_SESSION_INFO &si = pSessionInfo[i];
        if(si.State == WTSActive)
        {                                                       
            DWORD dwIdCurrentSession = si.SessionId;

            std::string strTitle = "Hello";
            std::string strMessage = "This is a message from the service";

            DWORD dwMsgBoxRetValue = 0;
            if(WTSSendMessage(
                WTS_CURRENT_SERVER_HANDLE,
                dwIdCurrentSession,
                (char*)strTitle.c_str(),
                strTitle.size(),
                (char*)strMessage.c_str(),
                strMessage.size(),
                MB_RETRYCANCEL | MB_ICONINFORMATION | MB_TOPMOST,
                60000,
                &dwMsgBoxRetValue,
                TRUE))
            {

                switch(dwMsgBoxRetValue)
                {
                    case IDTIMEOUT:
                        // Deal with TimeOut...
                        break;
                    case IDCANCEL:          
                        // Deal With Cancel....
                        break;
                }               
            }
            else
            {
                // Deal With Error
            }

            break;
        }
    }

    WTSFreeMemory(pSessionInfo);    
}