Q:

Why I have empty windows logs after success EventWrite function call

I have a manifest file with several events and two channels. 
I generate include and resource file via mc command:
mc -um manifest.man

I link resource files into the application. 
I install manifest in the system via wevtutil command:
wevtutil.exe im manifest.man

In application I use EventRegister for initialization log, and EventWrite for log writing. 
The next code for generating log event return ERROR_SUCCESS:
EVENT_DATA_DESCRIPTOR data;
 ULONG writeEvent(const std::string& message){
   std::string log_message_str( message );
   EVENT_DATA_DESCRIPTOR data;
   EVENT_DESCRIPTOR description;
   EventDataDescCreate( &data, message.c_str(), static_cast<ULONG>(log_message_str.size() + 1) );

   return EventWrite(log_handle, &description, 1, &data);
 }

Also, I grant read permissions to my application for LocalService:
icacls "service_win.exe" /grant "NT AUTHORITY\LocalService":R /Q

I start my application such as service with 'NT AUTHORITY\LocalService' account:
sc.exe create service_win binpath=D:\service_win.exe type=own obj='NT AUTHORITY\LocalService'
net start service_win

The channels declared in my manifest.man added in WinEvents journal, but are empty.  
In the application I write to log via writeEvent every one second with ERROR_SUCCESS result, but my logs files still are empty. 
UPDATE:
I create github repo with steps for reproduce

A:

You are using Event Tracing technology.  It requires provider create events and consumer consume events.  
If you want to view events via Event Viewer you can refer to Using Event Logging. 
So the issue here is you can't see these events in Event Viewer even if your events write successfully.  These events missed because you never start a consumer to consume them.  
Refer to Events lost reasons. 
You can find them via ETW logging in Windows Device Portal like this:

Refer to Consuming Events for detailed information about how to consume events.  

A:

I found a solution. 
The problem was in trace session and auto generated code from mc utility. 
Need to call mc with -um flag and use auto generated functions for log write. 
Working sample is here

