diff --git a/samples/pdfium_test_event_helper.h b/samples/pdfium_test_event_helper.h
new file mode 100644
index 0000000..e823369
--- /dev/null
+++ b/samples/pdfium_test_event_helper.h
@@ -0,0 +1,17 @@
+// Copyright 2018 The PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SAMPLES_PDFIUM_TEST_EVENT_HELPER_H_
+#define SAMPLES_PDFIUM_TEST_EVENT_HELPER_H_
+
+#include <string>
+
+#include "public/fpdf_formfill.h"
+#include "public/fpdfview.h"
+
+void SendPageEvents(FPDF_FORMHANDLE form,
+                    FPDF_PAGE page,
+                    const std::string& events);
+
+#endif  // SAMPLES_PDFIUM_TEST_EVENT_HELPER_H_