please help me

this program allows you to change the screen resolution (it’s for the gameplayer, perhaps you have read about it here in this forum). it’s just a test for me to know whether this program works on different computers.

here is the file:
http://www.geocities.com/sanderwozniak/ChangeResolution.zip

thank you!

-It doesn’t work correctly.It doesn’t reduce everything in the screen,but makes visible only a part of the desktop