# C1.Win.C1Chart.YFunction.CustomFunction

## Content

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<h1 id="C1_Win_C1Chart_YFunction_CustomFunction_" data-uid="C1.Win.C1Chart.YFunction.CustomFunction*">CustomFunction Property
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<a id="C1_Win_C1Chart_YFunction_CustomFunction_" data-uid="C1.Win.C1Chart.YFunction.CustomFunction*"></a>
<h4 id="C1_Win_C1Chart_YFunction_CustomFunction" data-uid="C1.Win.C1Chart.YFunction.CustomFunction">CustomFunction</h4>
<div class="markdown level1 summary"><p>Gets or sets a user-defined custom function object.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">[Browsable(false)]
public ISimpleFunction CustomFunction { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">&lt;Browsable(False)&gt;
Public Property CustomFunction As ISimpleFunction</code></pre>
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<h5 id="C1_Win_C1Chart_YFunction_CustomFunction_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>To obtain complete control of the Yfunction calculation, a class inheriting from
<a class="xref" href="C1.Win.C1Chart.ISimpleFunction.html">ISimpleFunction</a> can be implemented and instantiated.
After the CustomFunction property is set to an instance of such a class object,
the chart will plot the user-defined <a class="xref" href="C1.Win.C1Chart.YFunction.html">YFunction</a> with the appropriate styles and legend entry.</p>
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<h5 id="C1_Win_C1Chart_YFunction_CustomFunction_seealso">See Also</h5>
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    <div><a class="xref" href="C1.Win.C1Chart.YFunction.html">YFunction</a></div>
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