TEventLogger

[Zdravko Donev]

I want to make a log with errors during the execution of my app. I'm trying to write an event to the windows Event Viewer with a VCL form application with C++ Builder XE5. I'm using Vcl.SvcMgr.TEventLogger class. The code in the header file is :

TEventLogger *Event;

The code in the cpp file is :

Event=new TEventLogger("MySource");
Event->LogMessage("MyMessage");

But beside my message, in the error description in the Event Viewer there is a message : "The description for Event ID 0 from source MySource cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted." . How can I remove that description and write only the message that I want? Should I be using other C++ class? I couldn't find any documentation about this class. The idea of using Event Viewer is that when the application is running on an user with restricted rights he won't be able to write to files, meaning I can't just type into a ".txt" file. If anyone else has a different idea how to make a log with errors, please share! :)

[Freak30]

If I remember corrctly, you don't pass the message to Event Viewer directly, but you pass an application name and message id. You need a DLL that contains the texts to the ID (don't ask me in what format). And you need a specific registry key (in local machine I think) pointing the Event Viewer to the path of the DLL. We also used this approach long ago in one of our applications but aren't using it anymore because it's so complicated. I would suggest the user needs to at least one directory where he/she has write permission. You could then enter the directory into some kind of ini file, read it on application start and write the log file into that directory.

The good thing about pessimism is, that you are always either right or pleasently surprised.