diff --git a/README.md b/README.md
index c69ee5f..dcd0a13 100644
--- a/README.md
+++ b/README.md
@@ -123,8 +123,6 @@ Types are given as symbols, for example 'int8 or 'pointer.
 
 Returns the size of given C type.
 
-***
-
 (**define-c-library** _scheme-name_ _headers_ _object-name_ _options_)
 
 Takes a scheme-name to bind the library to, list of C headers as
@@ -269,16 +267,7 @@ Example:
 
 ### c-bytevector
 
-(**make-c-bytevector** _k_)
-(**make-c-bytevector** _k_ _fill_)
-
-Returns a newly allocated c-bytevector of _k_ bytes.
-
-If the _fill_ argument is missing, the initial contents of the
-returned c-bytevector are unspecified.
-
-If the _fill_ argument is present, it's value must confine to C uint8_t values
-, it specifies the initial value for the bytes of the c-bytevector
+#### Creation and deletion
 
 (**make-c-null**)
 
@@ -292,7 +281,23 @@ Returns **#t** if _obj_ is a null C pointer, otherwise returns **#f**.
 
 Frees _c-bytevector_ from memory.
 
-native-endianness
+(**make-c-bytevector** _k_)
+(**make-c-bytevector** _k_ _fill_)
+
+Returns a newly allocated c-bytevector of _k_ bytes.
+
+If the _fill_ argument is missing, the initial contents of the
+returned c-bytevector are unspecified.
+
+If the _fill_ argument is present, it's value must confine to C uint8_t values
+, it specifies the initial value for the bytes of the c-bytevector
+
+
+#### Accessors
+
+(**native-endianness**)
+
+
 c-bytevector-s8-set!
 c-bytevector-s8-ref
 c-bytevector-s16-set!
diff --git a/documentation/foreign-c.html b/documentation/foreign-c.html
index 4574eaf..2dbce61 100644
--- a/documentation/foreign-c.html
+++ b/documentation/foreign-c.html
@@ -2,8 +2,8 @@
 <html lang="en">
     <head>
         <meta charset="utf-8">
-        <title>foreign-c a portable foreign function interface for
-R7RS - 0.10.0</title>
+        <title>foreign-c a portable foreign function interface for R7RS
+Schemes - 0.10.0</title>
         <style>
             table { width: 250%; }
             nav { float: left; width: 20%;}
@@ -14,23 +14,20 @@ R7RS - 0.10.0</title>
     <body>
         <h1 id="foreign-c">foreign-c</h1>
         <p>foreign-c is a C foreign function interface (FFI) library for
-        R7RS. It is portable in the sense that it supports multiple
-        implementations, as opposed to being portable by conforming to
-        some specification.</p>
-        <p><a
-        href="https://todo.sr.ht/~retropikzel/r7rs-pffi">Project</a></p>
-        <p><a href="https://sr.ht/~retropikzel/r7rs-pffi/trackers">Issue
-        trackers</a></p>
-        <p><a href="https://sr.ht/~retropikzel/r7rs-pffi/lists">Maling
+        R7RS Schemes. It is portable in the sense that it supports
+        multiple implementations, as opposed to being portable by
+        conforming to some specification.</p>
+        <p><a href="https://sr.ht/~retropikzel/foreign-c/trackers">Issue
+        tracker</a></p>
+        <p><a href="https://sr.ht/~retropikzel/foreign-c/lists">Maling
         lists</a></p>
-        <p><a
-        href="https://jenkins.scheme.org/job/r7rs_pffi/job/r7rs-pffi/">Jenkins</a></p>
         <ul>
         <li><a href="#installation">Installation</a></li>
         <li><a href="#documentation">Documentation</a>
         <ul>
         <li><a href="#types">Types</a></li>
-        <li><a href="#primitives">Primitives</a></li>
+        <li><a href="#primitives-1">Primitives 1</a></li>
+        <li><a href="#primitives-2">Primitives 2</a></li>
         <li><a href="#c-bytevector">c-bytevector</a></li>
         <li><a href="#environment-variables">Environment
         variables</a></li>
@@ -38,7 +35,7 @@ R7RS - 0.10.0</title>
         </ul>
         <h2 id="implementation-support-tables">Implementation support
         tables</h2>
-        <h3 id="primitives-1">Primitives 1</h3>
+        <h3 id="primitives-1-table">Primitives 1 table</h3>
         <table>
         <colgroup>
         <col style="width: 13%" />
@@ -153,7 +150,7 @@ R7RS - 0.10.0</title>
         </tr>
         </tbody>
         </table>
-        <h3 id="primitives-2">Primitives 2</h3>
+        <h3 id="primitives-2-table">Primitives 2 table</h3>
         <table>
         <thead>
         <tr class="header">
@@ -280,14 +277,13 @@ R7RS - 0.10.0</title>
         <h3 id="installation">Installation</h3>
         <p>Either download the latest release from <a
         href="https://git.sr.ht/~retropikzel/foreign-c/refs">https://git.sr.ht/~retropikzel/foreign-c/refs</a>
-        or git clone , preferably with a tag, and copy the “foreign”
-        directory to your library directory.</p>
-        <p>As an example assuming you have a project and your libraries
-        live in directory called snow in it:</p>
+        or git clone , preferably with a tag, and copy the
+        <em>foreign</em> directory to your library directory.</p>
+        <p>Example assuming libraries in directory <em>snow</em>:</p>
         <pre><code>git clone https://git.sr.ht/~retropikzel/foreign-c --branch LATEST_VERSION
 mkdir -p snow
 cp -r foreign-c/foreign snow/
-make -C snow/foreign/c &lt;SCHEME_IMPLEMENTATION_NAME&gt;</code></pre>
+make -C snow/foreign/c SCHEME_IMPLEMENTATION_NAME</code></pre>
         <p>With most implementations the make command does not compile
         anything. When that is the case it will say “Nothing to build on
         SCHEME_IMPLEMENTATION_NAME.”</p>
@@ -314,13 +310,20 @@ make -C snow/foreign/c &lt;SCHEME_IMPLEMENTATION_NAME&gt;</code></pre>
         <li>unsigned-long</li>
         <li>float</li>
         <li>double</li>
-        <li>pointer</li>
+        <li>pointer
+        <ul>
+        <li>c-bytevector on Scheme side</li>
+        </ul></li>
         <li>callback
         <ul>
         <li>Callback function</li>
         </ul></li>
+        <li>void
+        <ul>
+        <li>Can not be argument type, only return type</li>
+        </ul></li>
         </ul>
-        <h3 id="primitives">Primitives</h3>
+        <h3 id="primitives-1">Primitives 1</h3>
         <p>(<strong>c-type-size</strong> <em>type</em>)</p>
         <p>Returns the size of given C type.</p>
         <p>(<strong>define-c-library</strong> <em>scheme-name</em>
@@ -331,7 +334,7 @@ make -C snow/foreign/c &lt;SCHEME_IMPLEMENTATION_NAME&gt;</code></pre>
         they are added automatically.</p>
         <p>The name of the shared object should not contain suffix like
         .so or .dll. Nor should it contain any prefix like “lib”.</p>
-        <p>The options are:</p>
+        <p>Options:</p>
         <ul>
         <li>additional-versions
         <ul>
@@ -363,20 +366,125 @@ make -C snow/foreign/c &lt;SCHEME_IMPLEMENTATION_NAME&gt;</code></pre>
         problems on some implementations.</li>
         <li>Do not store options in variables, that might lead to
         problems on some implementations.</li>
-        <li>Do pass the headers using quote
+        <li>Pass the headers using quote
         <ul>
-        <li>As ’(… and not (list…</li>
+        <li>As ’(…) and not (list…)</li>
         </ul></li>
-        <li>Do pass the options using quote
+        <li>Pass the options using quote
         <ul>
-        <li>As ’(… and not (list… define-c-procedure define-c-callback
-        c-bytevector? c-bytevector-u8-set! c-bytevector-u8-ref
-        c-bytevector-pointer-set! c-bytevector-pointer-ref</li>
+        <li>As ’(…) and not (list…)</li>
         </ul></li>
         </ul>
+        <p>(<strong>define-c-procedure</strong> <em>scheme-name</em>
+        <em>shared-object</em> <em>c-name</em> <em>return-type</em>
+        <em>argument-type</em>)</p>
+        <p>Takes a scheme-name to bind the C procedure to, shared-object
+        where the function is looked from, c-name of the function as
+        symbol, return-type and argument-types.</p>
+        <p>Defines a new foreign function to be used from Scheme
+        code.</p>
+        <p>Example:</p>
+        <pre><code>(cond-expand
+    (windows (define-c-library libc-stdlib &#39;(&quot;stdlib.h&quot;) &quot;ucrtbase&quot; &#39;()))
+    (else (define-c-library libc-stdlib &#39;(&quot;stdlib.h&quot;)  &quot;c&quot; &#39;(&quot;6&quot;))))
+(define-c-procedure c-puts libc-stdlib &#39;puts &#39;int &#39;(pointer))
+(c-puts &quot;Message brought to you by foreign-c!&quot;)</code></pre>
+        <h4 id="notes-1">Notes</h4>
+        <ul>
+        <li>Pass the return-types using quote
+        <ul>
+        <li>As ’(…) and not (list…)</li>
+        </ul></li>
+        </ul>
+        <p>(<strong>c-bytevector?</strong> <em>obj</em>)</p>
+        <p>Returns <strong>#t</strong> if <em>obj</em> is c-bytevector,
+        otherwise returns <strong>#f</strong>.</p>
+        <p>(<strong>c-bytevector-u8-set!</strong> <em>c-bytevector</em>
+        <em>k</em> <em>byte</em>)</p>
+        <p>If K is not a valid index of c-bytevector the behaviour is
+        undefined.</p>
+        <p>Stores the byte in element k of c-bytevector.</p>
+        <p>(<strong>c-bytevector-u8-ref</strong> <em>c-bytevector</em>
+        <em>k</em>)</p>
+        <p>If K is not a valid index of c-bytevector the behaviour is
+        undefined.</p>
+        <p>Returns the byte at index k of c-bytevector.</p>
+        <p>(<strong>c-bytevector-pointer-set!</strong>
+        <em>c-bytevector</em> <em>k</em> <em>pointer</em>)</p>
+        <p>If K is not a valid index of c-bytevector the behaviour is
+        undefined.</p>
+        <p>Stores the pointer(which is also c-bytevector) in element k
+        of c-bytevector.</p>
+        <p>(<strong>c-bytevector-pointer-ref</strong>
+        <em>c-bytevector</em> <em>k</em> <em>pointer</em>)</p>
+        <p>If K is not a valid index of c-bytevector the behaviour is
+        undefined.</p>
+        <p>Returns the pointer(which is also c-bytevector) at index k of
+        c-bytevector.</p>
+        <h3 id="primitives-2">Primitives 2</h3>
+        <p>(<strong>define-c-callback</strong> <em>scheme-name</em>
+        <em>return-type</em> <em>argument-types</em>
+        <em>procedure</em>)</p>
+        <p>Takes scheme-name to bind the Scheme procedure to,
+        return-type, argument-types and procedure as in place
+        lambda.</p>
+        <p>Defines a new Sceme function to be used as callback to C
+        code.</p>
+        <p>Example:</p>
+        <pre><code>; Load the shared library
+(cond-expand
+    (windows (define-c-library libc-stdlib &#39;(&quot;stdlib.h&quot;) &quot;ucrtbase&quot; &#39;()))
+    (else (define-c-library &#39;(&quot;stdlib.h&quot;) &quot;c&quot; &#39;(&quot;&quot; &quot;6&quot;))))
+
+; Define C function that takes a callback
+(define-c-procedure qsort libc-stdlib &#39;qsort &#39;void &#39;(pointer int int callback))
+
+; Define our callback
+(pffi-define-callback compare
+                      &#39;int
+                      &#39;(pointer pointer)
+                      (lambda (pointer-a pointer-b)
+                        (let ((a (pffi-pointer-get pointer-a &#39;int 0))
+                              (b (pffi-pointer-get pointer-b &#39;int 0)))
+                          (cond ((&gt; a b) 1)
+                                ((= a b) 0)
+                                ((&lt; a b) -1)))))
+
+; Create new array of ints to be sorted
+(define array (make-c-bytevector (* (c-size-of &#39;int) 3)))
+(pffi-pointer-set! array &#39;int (* (c-size-of &#39;int) 0) 3)
+(pffi-pointer-set! array &#39;int (* (c-size-of &#39;int) 1) 2)
+(pffi-pointer-set! array &#39;int (* (c-size-of &#39;int) 2) 1)
+
+(display array)
+(newline)
+;&gt; (3 2 1)
+
+; Sort the array
+(qsort array 3 (c-size-of &#39;int) compare)
+
+(display array)
+(newline)
+;&gt; (1 2 3)</code></pre>
         <h3 id="c-bytevector">c-bytevector</h3>
-        <p>make-c-bytevector make-c-null c-null? c-free
-        native-endianness c-bytevector-s8-set! c-bytevector-s8-ref
+        <p>(<strong>make-c-bytevector</strong> <em>k</em>)
+        (<strong>make-c-bytevector</strong> <em>k</em>
+        <em>fill</em>)</p>
+        <p>Returns a newly allocated c-bytevector of <em>k</em>
+        bytes.</p>
+        <p>If the <em>fill</em> argument is missing, the initial
+        contents of the returned c-bytevector are unspecified.</p>
+        <p>If the <em>fill</em> argument is present, it’s value must
+        confine to C uint8_t values , it specifies the initial value for
+        the bytes of the c-bytevector</p>
+        <p>(<strong>make-c-null</strong>)</p>
+        <p>Returns a null C pointer.</p>
+        <p>(<strong>c-null?</strong> <em>obj</em>)</p>
+        <p>Returns <strong>#t</strong> if <em>obj</em> is a null C
+        pointer, otherwise returns <strong>#f</strong>.</p>
+        <p>(<strong>c-free</strong> <em>c-bytevector</em>)</p>
+        <p>Frees <em>c-bytevector</em> from memory.</p>
+        <p>native-endianness c-bytevector-s8-set! c-bytevector-s8-ref
         c-bytevector-s16-set! c-bytevector-s16-ref
         c-bytevector-s16-native-set! c-bytevector-s16-native-ref
         c-bytevector-u16-set! c-bytevector-u16-ref
diff --git a/documentation/foreign-c.pdf b/documentation/foreign-c.pdf
index 41d8d83..60fdede 100644
Binary files a/documentation/foreign-c.pdf and b/documentation/foreign-c.pdf differ
diff --git a/foreign/c.sld b/foreign/c.sld
index 4aeec0e..e1041a0 100644
--- a/foreign/c.sld
+++ b/foreign/c.sld
@@ -219,10 +219,10 @@
           c-bytevector-pointer-ref
 
           ;;;; c-bytevector
-          make-c-bytevector
           make-c-null
           c-null?
           c-free
+          make-c-bytevector
           native-endianness
           c-bytevector-s8-set!
           c-bytevector-s8-ref
