Dear moomoo:
In PPT 2002/2003, this will work if you have a solid background:
1. Draw the line that you want to rotate
2. Duplicate the line and change its color to be the same as your slide
background
3. Place the two lines end to end
4. Group the two lines
5. Draw the point using the oval drawing tool - place it where the two lines
meet (it should cover the area where the two lines meet)
6. Select the grouped lines
7. Animate the slides using the animation emphasis Spin. Set to 360-degrees
for a complete rotation.