Mihov Active 800x600 is a program for web and software developers. It helps you see how large a program or browser window would be if resized to a screen size of 800 x 600 pixels or some other size user specifies.
This is done by pressing the Start button within the program and then in three seconds selecting the window that needs to be resized. The window will automatically change to chosen size and you will see the contents of it refreshed. You will be able to see the change without changing the screen resolution!