Can anyone tell me how do I write a small C++ program?

Question

I need a program that light's up a pre-defined pixel on the screen so that the user think the display is faulty :-) Gonna play a trick on my friend :-) I'll appreciate the ready script most, got the compiler and stuff. Thanks !!

Answer 1

You would need to create a visual application that has no window border, no maximize, minimize or close buttons. The application will have to be top most (this will ensure that no other window covers it) with a tiny visible area that can be assigned an obscure color.

Answer 2

That is not really possible to do without some serious modification to your friend's OS. Programs are only in charge of the pixels within their window(s), and even then you generally don't have pixel-by-pixel control over those images. You could make something that goes fullscreen and does that, but it would be easily removed and pretty complicated.