nwn2 
//RWT-OEI 03/11/08
//Clear a listbox on the client's GUI.
// oPlayer - Player Object to send the clear message to.
// sScreenName - Name of the screen that contains the listbox.
// sListBox - Name of the listbox to clear
//As with other GUI modifying script functions, the GUI must be scriptloadable.
void ClearListBox( object oPlayer, string sScreenName, string sListBox );