-WXWindow wxScreenDC::sm_overlayWindow = 0;
-int wxScreenDC::sm_overlayWindowX = 0;
-int wxScreenDC::sm_overlayWindowY = 0;
+WXWindow wxScreenDCImpl::sm_overlayWindow = 0;
+int wxScreenDCImpl::sm_overlayWindowX = 0;
+int wxScreenDCImpl::sm_overlayWindowY = 0;