I put the valve.dll and the WONDLL.dll in the half-life directory and when i start the game and change the game to half-life WON it reloads the page but it does not change the vision of the game if someone would help I would be very great full.
There is no valve.dll. I presume you mean the valve_WON folder.
What client are you using and how are you checking to see if the version has changed?
You could always use this
It has Half Life WON premade for you.