How to make simple hover effect to buttons?

Im making windows app and users said that hover effect on buttons would be great.
Can you make me step by step simple instructions that how to make it ?

Exactly what do you mean?
Do you want a shadow? Color change? You have to be specific.

The theory is the same for all of them:

-User mouse pointer is over an Active object (your button)
+(trigger whatever you want to happen)

e.g.

-User mouse pointer is over Button object
+Change objects Effect to invert

-User mouse is not over button object (right click and select negate on an event to make it negative)
+Change object Effect to none.

That would make it invert colors. You can change it's animation to something else if you have drawn something else, or create a shadow object and move it to behind the button if you want shadows.