I need to create a notification balloon message in Windows 7 from the Command prompt with custom text. I have searched Google and found shell32.
Notifu is a free open source Windows program that makes balloons appear in the systray with custom text you specify. You can run it from the command-line, so it's easy to include it in a scheduled task or batch file.
http://www.paralint.com/projects/notifu/download.html#Download