http://www.vb-helper.com/HowTo/bounce1.zip   Purpose Animate a bouncing ball on a background.   Method Use BitBlt to erase the ball. Then draw the ball in its new location. When the ball gets too close to the edge of the picture, reverse the sign of its X or Y velocity.   Disclaimer This example program is provided "as is" with no warranty of any kind. It is intended for demonstration purposes only. In particular, it does no error handling. You can use the example in any form, but please mention www.vb-helper.com. Downloads In IE right-click and select 'Save Target As...' or in Netscape right-click and select 'Save Link As...'    View Plain Text  Download Demo Project  Not Available