>>
>>It's all a bit more involved. First, do you want to open the file with 12 (exclusive)? If so, I would not be able to analyze it, etc.?
>>
>>And it will require more changes - so becomes more complex to do a re-write.
>
>
>
>Not necessarily more complex
>
>You could have a function WriteLogLine() which in the current scenario would perform one strtofile()
>That is already better
>
>As to the read access to the log file from another program, there must be a way using CreateFile() API http://msdn.microsoft.com/en-us/library/aa363858(VS.85).aspx
>
>Where
>- dwDesiredAccess is GenericWrite
>- dwShareMode is FILE_SHARE_READ
>
>
>
>And - for looking at the log file : tail - f comes to mind - I found a Windows version - not tested - http://tailforwin32.sourceforge.net/

I'm still not getting it. Well, I found CreateFile example
http://www.news2news.com/vfp/?example=10

so, using that how do I add lines to the end of the file?

Also, what if I want to delete the log file in the process of my dll running - I assume I would not be able to?