First of All What is Active-x ?

ActiveX control is control like all visual basic common controls:
Command Button, Label, etc.

You can make your own ActiveX control, for example hover button control, and use it in every VB program you make without addition of code.

Instead of writing the same code every time you want to use the hover button, make once hover button ActiveX control, and drag it to your form every time you want to use it, like it was the usual Command Button.