n return"><dt>Returns</dt><dd><ul>
<li>XST_SUCCESS if callback function installed successfully.</li>
<li>XST_INVALID_PARAM when HandlerType is invalid.</li>
</ul>
</dd></dl>
<dl class="section note"><dt>Note</dt><dd>Invoking this function for a handler that already has been installed replaces it with the new handler. </dd></dl>

<p>References <a class="el" href="struct_x_v___sdi_tx.html#aed8cfe1133b6634062a812d071a0aa22">XV_SdiTx::Axi4sVidLockCallback</a>, <a class="el" href="struct_x_v___sdi_tx.html#abf365