diff --git a/seamless.c b/seamless.c
index 15e4292..48845d3 100644
--- a/seamless.c
+++ b/seamless.c
@@ -196,6 +196,29 @@ seamless_process_line(const char *line, void *data)
 	{
 		printf("SeamlessRDP:%s\n", line);
 	}
+	else if (!strcmp("SYNCBEGIN", tok1))
+	{
+		if (!tok2)
+			return False;
+
+		flags = strtoul(tok2, &endptr, 0);
+		if (*endptr)
+			return False;
+
+		ui_seamless_syncbegin(flags);
+	}
+	else if (!strcmp("SYNCEND", tok1))
+	{
+		if (!tok2)
+			return False;
+
+		flags = strtoul(tok2, &endptr, 0);
+		if (*endptr)
+			return False;
+
+		/* do nothing, currently */
+	}
+
 
 	xfree(l);
 	return True;
diff --git a/xwin.c b/xwin.c
index e42e135..ecf68d0 100644
--- a/xwin.c
+++ b/xwin.c
@@ -3214,3 +3214,15 @@ ui_seamless_setstate(unsigned long id, unsigned int state, unsigned long flags)
 			break;
 	}
 }
+
+
+void
+ui_seamless_syncbegin(unsigned long flags)
+{
+	/* Destroy all seamless windows */
+	while (g_seamless_windows)
+	{
+		XDestroyWindow(g_display, g_seamless_windows->wnd);
+		seamless_remove_window(g_seamless_windows);
+	}
+}