Format
winexists(player, control_id)
Args
player: A mob or client.control_id: The unique ID of a control in the player’s skin.
Tells if a control exists and if so, what type it is. The return value is an empty string if the control does not exist, but otherwise it is the type of control.
This proc will not tell you if a control has been defined in the skin file but is not in use yet.
Because the client must be contacted to get this information, winexists() will sleep the current proc.