--- a/ref_c_data_flow.xml
+++ b/ref_c_data_flow.xml
@@ -77,6 +77,7 @@
       <para>The last statement before returning the output of the function is <function>ecl_va_end</function>. This macro performs any required cleanup and should never be omitted.</para>
     </refsect1>
   </refentry>
+
   <refentry>
     <refnamediv>
       <refname><function>ecl_nth_value</function>, <function>ecl_nvalues</function></refname>
@@ -135,6 +136,126 @@
 
   <refentry>
     <refnamediv>
+      <refname><function>ecl_return0</function>, <function>ecl_return1</function>, ...</refname>
+      <refpurpose>Returning multiple values</refpurpose>
+    </refnamediv>
+
+    <refsynopsisdiv>
+      <funcsynopsis>
+	<funcprototype>
+	  <?dbhtml funcsynopsis-style='ansi'?>
+	  <funcdef><function>ecl_return0</function></funcdef>
+	  <paramdef>cl_env_ptr <parameter>cl_env</parameter></paramdef>
+	</funcprototype>
+      </funcsynopsis>
+
+      <funcsynopsis>
+	<funcprototype>
+	  <?dbhtml funcsynopsis-style='ansi'?>
+	  <funcdef><function>ecl_return1</function></funcdef>
+	  <paramdef>cl_env_ptr <parameter>cl_env</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value1</parameter></paramdef>
+	</funcprototype>
+      </funcsynopsis>
+
+      <funcsynopsis>
+	<funcprototype>
+	  <?dbhtml funcsynopsis-style='ansi'?>
+	  <funcdef><function>ecl_return2</function></funcdef>
+	  <paramdef>cl_env_ptr <parameter>cl_env</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value1</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value2</parameter></paramdef>
+	</funcprototype>
+      </funcsynopsis>
+
+      <funcsynopsis>
+	<funcprototype>
+	  <?dbhtml funcsynopsis-style='ansi'?>
+	  <funcdef><function>ecl_return3</function></funcdef>
+	  <paramdef>cl_env_ptr <parameter>cl_env</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value1</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value2</parameter></paramdef>
+	  <paramdef>cl_object <parameter>value3</parameter></paramdef>
+	</funcprototype>
+      </funcsynopsis>
+   </refsynopsisdiv>
+
+   <refsect1>
+     <title>Description</title>
+
+     <para>Returns <replaceable>N</replaceable> values from a C/C++ function in a way that a Common Lisp function can recognize and use them. The 0-th value is returned directly, while values 1 to N are stored in the Common Lisp environment <replaceable>cl_env</replaceable>. This macro has to be used from a function which returns an object of type <type>cl_object</type>.</para>
+   </refsect1>
+  </refentry>
+
+  <refentry>
+    <refnamediv>
+      <refname><function>ECL_BLOCK_BEGIN</function></refname>
+      <refpurpose>C macro for <ulink url="&clhs;s_block.htm"><symbol>block</symbol></ulink></refpurpose>
+    </refnamediv>
+
+    <refsynopsisdiv>
+      <synopsis><code><function>ECL_BLOCK_BEGIN</function>(env,code) {</code></synopsis>
+      <synopsis><code>} <function>ECL_BLOCK_END</function>;</code></synopsis>
+    </refsynopsisdiv>
+
+    <refsect1>
+      <title>Description</title>
+
+      <para><function>ECL_BLOCK_BEGIN</function> establishes a block named <replaceable>code</replaceable> that becomes visible for the Common Lisp code. This block can be used then as a target for <function>cl_return</function>.</para>
+
+      <para><replaceable>env</replaceable> must be the value of the current Common Lisp environment, obtained with <function>ecl_process_env</function>.</para>
+
+      <para>The C/C++ program has to ensure that the code in <function>ECL_BLOCK_END</function> gets executed, avoiding a direct exit of the block via <code>goto</code> or a C/C++ <code>return</code>.</para>
+    </refsect1>
+  </refentry>
+
+  <refentry>
+    <refnamediv>
+      <refname><function>ECL_CATCH_BEGIN</function></refname>
+      <refpurpose>C macro for <ulink url="&clhs;s_catch.htm"><symbol>catch</symbol></ulink></refpurpose>
+    </refnamediv>
+
+    <refsynopsisdiv>
+      <synopsis><code><function>ECL_CATCH_BEGIN</function>(env,tag) {</code></synopsis>
+      <synopsis><code>} <function>ECL_CATCH_END</function>;</code></synopsis>
+    </refsynopsisdiv>
+
+    <refsect1>
+      <title>Description</title>
+
+      <para><function>ECL_CATCH_BEGIN</function> establishes a destination for <symbol>throw</symbol> with the code given by <replaceable>tag</replaceable>.</para>
+
+      <para><replaceable>env</replaceable> must be the value of the current Common Lisp environment, obtained with <function>ecl_process_env</function>.</para>
+
+      <para>The C/C++ program has to ensure that the code in <function>ECL_CATCH_END</function> gets executed, avoiding a direct exit of the catch block via <code>goto</code> or a C/C++ <code>return</code>.</para>
+    </refsect1>
+  </refentry>
+
+  <refentry>
+    <refnamediv>
+      <refname><function>ECL_UNWIND_PROTECT_BEGIN</function></refname>
+      <refpurpose>C macro for <ulink url="&clhs;s_unwind.htm"><symbol>unwind-protect</symbol></ulink></refpurpose>
+    </refnamediv>
+
+    <refsynopsisdiv>
+      <synopsis><code><function>ECL_UNWIND_PROTECT_BEGIN</function>(env) {</code></synopsis>
+      <synopsis><code>} <function>ECL_UNWIND_PROTECT_EXIT</function> {</code></synopsis>
+      <synopsis><code>} <function>ECL_UNWIND_PROTECT_END</function>;</code></synopsis>
+    </refsynopsisdiv>
+
+    <refsect1>
+      <title>Description</title>
+
+      <para><function>ECL_UNWIND_PROTECT_BEGIN</function> establishes two blocks of C code that work like the equivalent ones in Common Lisp: a protected block, contained between the "BEGIN" and the "EXIT" statement, and the exit block, appearing immediately afterwards. The form guarantees that the exit block is always executed, even if the protected block attempts to exit via som nonlocal jump construct (<symbol>throw</symbol>,<symbol>return</symbol>, etc).</para>
+
+      <para><replaceable>env</replaceable> must be the value of the current Common Lisp environment, obtained with <function>ecl_process_env</function>.</para>
+
+      <para>The utility of this construct is limited, for it only protects against nonlocal exits caused by Common Lisp constructs: it does not interfere with C <code>goto</code>, <code>return</code> or with C++ exceptions.</para>
+    </refsect1>
+  </refentry>
+
+  <refentry>
+    <refnamediv>
       <refname>ANSI Dictionary</refname>
       <refpurpose>&ANSI-C-Dict;</refpurpose>
     </refnamediv>
@@ -228,4 +349,4 @@
   </refentry>
 </section>
 </chapter>
-</book>+</book>