Let's try to identify what we need to do to achieve the effect of hiding out our window square by square. Just think:

It is awfully inefficient if we choose to change its shape several times per second (creating irregular shaped windows is also available on VB Offbeat site). This will come up to be a very difficult task and also, if done, it will be so slow and resource-consuming that you will soon give up.

So, we have to find something more acceptable. And the solution is at one hand - we have to simulate the disappearance of some parts of the window (in our case, squares). And as we cannot just remove them that easily, we must cheat the user that they disappear.

And we come to the conclusion that we need a picture which will cover the entire window and also we need to draw some squares that represent the background behind our window onto this picture. We'll do this at random and with small squares to achieve the effect.

What's actually left is the way we will do it!

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Copyright (c) 1999, Billy&George Software and Peter Dimitrov
Revised May 1999