View difference between Paste ID: iAQsQHPS and yyQwHktr

 ...
 SetWindowsHookEx(WH_KEYBOARD_LL, hook_proc(), null, 0);
 ...
 
 function hook_proc() {
-  var prevstate;
+  var someState;
-  var newstate;
+
     // someState is captured in this closure
     ...
   };
 }