owID">TWebUIWindowID</a>; const filename: <a href="uWebUITypes.html#PWebUIChar">PWebUIChar</a>; len: PInteger): Pointer; cdecl;</code></td>
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<td class="itemcode"><span id="TWebUIInterfaceEventCallback"></span><code><strong>TWebUIInterfaceEventCallback</strong> = procedure(window : <a href="uWebUITypes.html#TWebUIWindowID">TWebUIWindowID</a>; event_type: <