This is pretty cool, but:
*There are alot of spelling errors.
*the disable maximize and minimize don't work (You can still max and min with the buttons on the titlebar.
*What's the password? Why does it just become impossible to select when you click on password dialog?? Edit:Because its a demo?
Pretty neat. Here is a suggestion:
Make a button that uses the enable/disable options, hides the program, hides the desktop, shows an image that covers the whole screen that the user can choose, and has an enter password button.