diff --git a/vala/extern_c/c_code.c b/vala/extern_c/c_code.c
new file mode 100644
index 0000000..11c19df
--- /dev/null
+++ b/vala/extern_c/c_code.c
@@ -0,0 +1,7 @@
+#include <glib.h>
+
+void c_func (gchar      *str,
+             GHashTable *htable)
+{
+  g_printf ("Do something with str and htable...");
+}
diff --git a/vala/extern_c/test.sh b/vala/extern_c/test.sh
new file mode 100755
index 0000000..d5f865e
--- /dev/null
+++ b/vala/extern_c/test.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+cc -c `pkg-config --cflags glib-2.0` c_code.c -o c_code.o
+valac -c vala_code.vala
+cc *.o -o app `pkg-config --libs glib-2.0 gobject-2.0`
diff --git a/vala/extern_c/vala_code.vala b/vala/extern_c/vala_code.vala
new file mode 100644
index 0000000..24f93a5
--- /dev/null
+++ b/vala/extern_c/vala_code.vala
@@ -0,0 +1,8 @@
+extern void c_func (string? str, HashTable<string, string> hash_func);
+
+void main () {
+  stdout.printf ("Hello world!\n");
+
+  var hash_func = new HashTable<string, string> (str_hash, str_equal);
+  c_func ("abc", hash_func);
+}