diff -r 1df2fb3d079c -r c9b8b9e0cfe8 ui/wpf/button.c
--- a/ui/wpf/button.c	Sun Jan 22 18:02:45 2017 +0100
+++ b/ui/wpf/button.c	Mon Jan 23 10:50:22 2017 +0100
@@ -44,7 +44,6 @@
         callback = (ui_callback)ui_button_callback;
     }
     
-    fflush(stdout);
     UiContainer *container = uic_get_current_container(obj);
     return UIbutton(container, label, callback, event);
 }