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<helpdocument version="1.0">
<meta>
<topic id="textscalcguideuserdefined_functionxml" indexer="include" status="PUBLISH">
<title id="tit" xml-lang="en-US">User-Defined Functions</title>
<filename>/text/scalc/guide/userdefined_function.xhp</filename>
</topic>
<history>
<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created>
</history>
</meta>
<body>
<bookmark xml-lang="en-US" branch="index" id="bm_id3155411"><bookmark_value>functions; user-defined</bookmark_value>
<bookmark_value>user-defined functions</bookmark_value>
<bookmark_value>Basic IDE for user-defined functions</bookmark_value>
<bookmark_value>IDE; Basic IDE</bookmark_value>
<bookmark_value>programming;functions</bookmark_value>
</bookmark>
<h1 id="hd_id3155411"><variable id="userdefined_function"><link href="text/scalc/guide/userdefined_function.xhp" name="Defining Functions Yourself">User-Defined Functions</link>
</variable></h1>
<paragraph role="paragraph" id="par_id3153969" xml-lang="en-US">You can apply user-defined functions in $[officename] Calc in the following ways:</paragraph>
<list type="unordered">
<listitem>
<paragraph role="listitem" id="par_id3145366" xml-lang="en-US">You can define your own functions using the Basic-IDE. This method requires a basic knowledge of programming.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3153768" xml-lang="en-US">You can program functions as <link href="text/scalc/01/04060111.xhp" name="add-ins">add-ins</link>. This method requires an advanced knowledge of programming.</paragraph>
</listitem>
</list>
<h2 id="hd_id3149260">Defining A Function Using %PRODUCTNAME Basic</h2>
<list type="ordered">
<listitem>
    <paragraph role="listitem" id="par_id3148456" xml-lang="en-US">Choose <switchinline select="sys"><caseinline select="MAC"><menuitem>%PRODUCTNAME - Preferences</menuitem></caseinline><defaultinline><menuitem>Tools - Options</menuitem></defaultinline></switchinline><menuitem> - %PRODUCTNAME Basic</menuitem>.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3154510" xml-lang="en-US">Click the <emph>Edit</emph> button. You will now see the Basic IDE.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3150327" xml-lang="en-US">Enter the function code. In this example, we define a <literal>VOL(a; b; c)</literal> function that calculates the volume of a rectangular solid with side lengths <literal>a</literal>, <literal>b</literal> and <literal>c</literal>:</paragraph>
</listitem>
</list>
<bascode>
    <paragraph role="bascode" id="par_id9797426" xml-lang="en-US" localize="false">Function VOL(a, b, c)</paragraph>
    <paragraph role="bascode" id="par_id781573129338912" xml-lang="en-US" localize="false">    VOL = a*b*c</paragraph>
    <paragraph role="bascode" id="par_id291573129348062" xml-lang="en-US" localize="false">End Function</paragraph>
</bascode>
<list type="unordered">
<listitem>
<paragraph role="listitem" id="par_id3155443" xml-lang="en-US">Close the Basic-IDE window.</paragraph>
<paragraph role="listitem" id="par_id3150043" xml-lang="en-US">Your function is automatically saved in the default module and is now available. If you apply the function in a Calc document that is to be used on another computer, you can copy the function to the Calc document as described in the next section.</paragraph>
</listitem>
</list>
<h2 id="hd_id3147340">Copying a Function To a Document</h2>
<paragraph role="paragraph" id="par_id3145232" xml-lang="en-US">In stage 2 of "Defining A Function Using %PRODUCTNAME Basic", in the <emph>Macro</emph> dialog you clicked on <emph>Edit </emph>. As the default, in the <emph>Macro from</emph> field the <emph>My Macros - Standard - Module1</emph> module is selected. The <emph>Standard</emph> library resides locally in your user directory.</paragraph>
<paragraph role="paragraph" id="par_id3154022" xml-lang="en-US">If you want to copy the user-defined function to a Calc document:</paragraph>
<list type="ordered">
<listitem>
    <paragraph role="listitem" id="par_id3150304" xml-lang="en-US">Choose <switchinline select="sys"><caseinline select="MAC"><menuitem>%PRODUCTNAME - Preferences</menuitem></caseinline><defaultinline><menuitem>Tools - Options</menuitem></defaultinline></switchinline><menuitem> - %PRODUCTNAME Basic</menuitem>.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3150086" xml-lang="en-US">In the <emph>Macro from</emph> field select <emph>My Macros - Standard - Module1</emph> and click <emph>Edit</emph>.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3166430" xml-lang="en-US">In the Basic-IDE, select the source of your user-defined function and copy it to the clipboard.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_idN1081D" xml-lang="en-US">Close the Basic-IDE.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3150517" xml-lang="en-US">Choose <item type="menuitem">Tools - Macros - Organize Macros - %PRODUCTNAME Basic</item> .</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3145384" xml-lang="en-US">In the <emph>Macro from</emph> field select <emph>(Name of the Calc document) - Standard - Module1</emph>. Click <emph>Edit</emph>.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3148699" xml-lang="en-US">Paste the clipboard contents in the Basic-IDE of the document.</paragraph>
</listitem>
</list>
<h2 id="hd_id3153305">Applying a User-defined Function in $[officename] Calc</h2>
<paragraph role="paragraph" id="par_id3148869" xml-lang="en-US">Once you have defined the function <literal>VOL(a; b; c)</literal> in the Basic-IDE, you can apply it the same way as the built-in functions of $[officename] Calc.</paragraph>
<list type="ordered">
<listitem>
<paragraph role="listitem" id="par_id3148606" xml-lang="en-US">Open a Calc document and enter numbers for the function parameters <literal>a</literal>, <literal>b</literal> and <literal>c</literal> in cells A1, B1, and C1.</paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3156019" xml-lang="en-US">Set the cursor in another cell and enter the following:</paragraph>
<paragraph role="paragraph" localize="false" id="par_id3155264" xml-lang="en-US"><input>=VOL(A1;B1;C1)</input></paragraph>
</listitem>
<listitem>
<paragraph role="listitem" id="par_id3146776" xml-lang="en-US">The function is evaluated and you will see the result in the selected cell.</paragraph>
</listitem>
</list>
<section id="relatedtopics">
<embed href="text/scalc/guide/calculate.xhp#calculate"/>
<embed href="text/scalc/guide/formula_enter.xhp#formula_enter"/>
</section>
</body>
</helpdocument>
