I tried to change a folder's icon (by code) by creating a desktop.ini file
[.ShellClassInfo]
IconFile=%SystemRoot%\system32\SHELL32.dll
IconIndex=131
but it isn't working I dont know why. I tried creating it in another file with windows and it worked ok, I tried to copy that same file to my dir and it didnt show the Icon, maybe windows stores in registry some info too?

Any help appreciated!