>>ListBox.
>
>This log is pretty big. We log transaction every 5 seconds. Each transaction has variable text length. It includes several lines. It also contains the XML result from the server. So, that content is variable, and it can grow very fast. So far, the textbox approach has worked. But, I know it has some limit.
>
>My goal would be to link that content into a file. So, basically, what we would see on the form would be as if seen from Notepad. Presently, it looks like that. I can cut and paste several parts of the text. I can clear it and save it to a file. But, it has a limit. With something like Notepad dropped on the form instead, that would do.

Hmm... well maybe you could use a listbox to display the last 100 messages that you also log to a file. Then have a button the lets you open the logfile with notepad. Perhaps you could create a new log file every hour or whatever.

BOb