diff --git a/src/launchUnelevated.js b/src/launchUnelevated.js
index 29df5be..b8eb00c 100644
--- a/src/launchUnelevated.js
+++ b/src/launchUnelevated.js
@@ -28,7 +28,8 @@ if (objShellWindows != null)
 
     if (objShellWindows.count === 0) {
         // If no File Explorer windows are open fall-back to this alternative way of executing the command
-        var item = objShellWindows.FindWindowSW(/*NULL*/0, /*NULL*/0, /*SWC_DESKTOP*/8, /*NULL*/0, /*SWFO_NEEDDISPATCH*/1);
+        // See IShellWindows::FindWindowSW at https://msdn.microsoft.com/en-us/library/windows/desktop/cc836568(v=vs.85).aspx
+        var item = objShellWindows.FindWindowSW(/*pvarLoc=NULL*/0, /*pvarLocRoot=NULL*/0, /*SWC_DESKTOP*/8, /*phwnd=NULL*/0, /*SWFO_NEEDDISPATCH*/1);
         item.Document.Application.ShellExecute(command, params);
     }
 }
\ No newline at end of file