>I am Processing some data which takes enough time. I need that after the process is completed a LOUD Sound is played at regular interval (as we see in washing Machines etc), and the sound should be played unless the Mouse Movement or some keyboard activity is performed.
Playing a sound is easy. Either use CHR(7) or the Windows API:
http://www.tomorrowssolutionsllc.com/Articles/Make%20Them%20Hear%20You!.PDFHowever, controlling the volume is another story. A search for "windows api volume control" turns up a number of hits; I have no idea whether any of them actually let you change the volume.
Tamar