is it possible to make, when a player tries to press a button, it does not work? Return Values is none

You can use use instead

So you have to use usebutton and then use trigger command to execute entities at a map.

NOTE
You have to leave empty buttons.

My english still sucks i meant: player tries to use button with some existing trigger, and this trigger should not work. ban on using buttons

Try and use the CS2D.com help page - you obviously know how to script or you would be asking for more help. Now learn how to RTFM.

triggerentity

Check the entity that is on that location to see if it's a button or not.

Thank you. I did it