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<concept id="GUID-2C74E932-B1CA-434B-AF96-66D52D689620" xml:lang="en"><title>Optional
resource file statements</title><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>The resource file statements listed in the following are optional; Create
resource file statements only for the UI components used by the application
for which the default implementation is not used.</p>
<p>For more information on resource statements for these components, see:</p>
<ul>
<li><p><xref href="GUID-A4F3738C-CBFD-4151-9132-26FE05966715.dita">CBA buttons</xref></p>
</li>
<li><p><xref href="GUID-E849C798-07A0-47B3-BDBF-203325062FBD.dita">Menu
bar resource statements</xref></p></li>
<li><p><xref href="GUID-B238952B-1691-49F4-B8B9-9F755011A7DD.dita">View
resource statements in the view architecture</xref></p>
</li>
<li><p><xref href="GUID-CCE6DC36-625C-487C-9AD8-F1BF8E36080A.dita">UI
components</xref></p>
<itemgroup>
<p>Building an AVKON-based application UI is a primary choice for third-party
add-on applications that do not need advanced customization. Such an approach
guarantees compatibility across different Series 60 Developer Platform editions,
but, in turn, puts some limitations on the application UI layout imposed by
AVKON.  AVKON provides a wide choice of well-designed and versatile components,
but not all of these are easily modifiable.</p>
<note>
<p>AVKON or AVKON-derived components should be favoured over custom <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Control_Environment/CCoeControlClass.html" format="application/java-archive"><parmname>CCoeControl</parmname></xref>-derived controls.  AVKON UI components <xref href="GUID-B02C762B-C452-4184-ABEA-4753E6CD47D2.dita">scale</xref> automatically
according to screen resolution and orientation.</p>
</note>
<ul>
<li><p><xref format="html" href="specs/guides/Dialogs_API_Specification/Dialogs_API_Specification.html.dita">Dialogs
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Editors_API_Specification/Editors_API_Specification.html.dita">Editors
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Form_API_Specification/Form_API_Specification.html.dita">Form
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Grids_API_Specification/Grids_API_Specification.html.dita">Grids
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Grids_API_Specification/Grids_API_Specification.html.dita">Lists
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Notes_API_Specification/Notes_API_Specification.html.dita">Notes
API</xref></p></li>
<li><p><xref format="html" href="specs/guides/Setting_Pages_API_Specification/Setting_Pages_API_Specification.html.dita">Setting
Pages API</xref></p></li>
</ul>
</itemgroup>
</li>
</ul>
</conbody></concept>