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<!DOCTYPE concept
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="GUID-8845AFD6-F238-43FF-BD7B-902CD8CD3973" xml:lang="en"><title>Showing
and hiding toolbar items</title><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>You can set toolbar items hidden or dimmed if a toolbar function is temporary
unavailable. </p>
<p>The example below shows how to set a button unavailable. In the example,
the boolean parameter <codeph>aHide</codeph> tells if the button should be
hidden or dimmed. </p>
<codeblock xml:space="preserve">void CMyAppView::SetButtonUnavailable( TBool aHide )
    {
    CAknToolbar* toolbar = Toolbar();
    if ( toolbar )
        {
        if ( aHide )
            {
            // To show the item again: 
            // toolbar-&gt;HideItem( KButtonId, EFalse, ETrue );
            toolbar-&gt;HideItem( KButtonId, ETrue, ETrue );
            }
        else
            {
            // To undim the item again:
            // toolbar-&gt;SetItemDimmed( KButtonId, EFalse, ETrue );
            toolbar-&gt;SetItemDimmed( KButtonId, ETrue, ETrue );
            }
        }
    }
</codeblock>
</conbody></concept>