Pooja,
I guess you want to demonstrate or simulate some action in a program?
There is capturing software that does this, SnagIt, Captivate, Camtasia and
such.
If you are working with screenhots, custom animation could help you, motion
paths is the way to go. You could easily animate a picture of a mouse cursor
moving towards a menu for instance.
Give us more details of what you are trying to achieve.
Luc Sanders
MVP - PowerPoint