To specify a location for the help log file
Open a project (.hhp) file, click Change Project Options, and then click the Files tab.
Specifies files, compiler, window, and other project settings.
In the Log file box, type the name of the file. If you want to save the file in a folder other than the one that contains the project file, type a path.
The log file contains all the compiler messages. You can display all messages or hide the ones you don't want to appear.