can't use windowId in QML on Windows

declarativeimports/core/dialog.cpp

@@ -350,10 +350,12 @@ int DialogProxy::windowFlags() const
     return (int)m_flags;
 }
 
+#ifndef Q_WS_WIN
 qulonglong DialogProxy::windowId() const
 {
     return m_dialog->winId();
 }
+#endif
 
 void DialogProxy::setWindowFlags(const int flags)
 {

declarativeimports/core/dialog.h

@@ -139,11 +139,13 @@ class DialogProxy : public QObject
      * Plasma Location of the dialog window. Useful if this dialog is apopup for a panel
      */
     Q_PROPERTY(int location READ location WRITE setLocation NOTIFY locationChanged)
-
+//This won't be available on windows, but should be used only by kwin and never by applets anyways
+#ifndef Q_WS_WIN
     /**
      * Window ID of the dialog window.
      **/
     Q_PROPERTY(qulonglong windowId READ windowId CONSTANT)
+#endif
 
 public:
     enum WidgetAttribute {
@@ -185,7 +187,9 @@ public:
 
     QObject *margins() const;
 
+#ifndef Q_WS_WIN
     qulonglong windowId() const;
+#endif
 
     /**
      * @returns The suggested screen position for the popup