I have a need to implement a popup messaging system within an application I'm writing.
I tried to do this by putting a timer object on the _screen and then this firing a lookup procedure every 10 seconds or so to see if any events had been raised in a table. If so, they were just displayed in a messagebox. However this placed quite an overhead on some of the PC's on which it was installed, so much so that I had to take it out.
I am thinking of something like this:
1) Main app launches listener app
2) Listener tests periodically if main is still running and if not shuts down
3) Listener does the polling for events via a time and the display of these, but forcing the messagebox to appear on top of everything else.

Any suggestions please?

TIA,
Simon