How to stop piracy of software developped in vb ?

I want to stop piracy of my software developed in vb. How to make demo software and how to make it as full version ?. Is there any free software available to do this ?How to stop piracy of software developped in vb ?
u made it in vb write it in a simple form app that checks for a file use a basic encrptor engine which built in to .net framework check it agains the pc name and serial code so cant be copied or along them lines but be honest with ya u not gonna stop it if microsoft (have room of coders) tryin to stop there stuff being pirated and it does easily u aint got much chance :) and demo project just use a boolean and the basic form that starts of that checks if its not full ver set boolean to false and use it on the actuly program to disable certain functions lets say u made a video converter



simple

when click button to convert

(if fullver = false then

and set max time to 2 mins so they can only convert files smaller than 2 mins

else



end if



or use a simular thing like a trial hidden file some where or dump in registy as long as value %26lt; 10 u can use it and every time u do anything on it it adds 1 to the value



in other words they get 10 goes of it after that they no longer can use it if i was u id use a few of um to check of against each other they may find 1 they aint gonna find 5How to stop piracy of software developped in vb ?
I don't get it?

Are you asking for a VB complier?
This sort of thing is often done thru Windows registry entries - during installation, an entry stores install date. Then every time the app starts, it checks whether the 'purchased' registry key is set and, if not, the system date is checked against the install date. When a purchase key is correctly entered, the registry key to indicate a legit purchase is created.