<div class="content" name="IEventSystem2" uuid="8c198fde-394d-4b4f-8528-a37ec8d2bfb0"><p>This interface is used to perform version checking and
transient <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_f362c255-5746-44db-aa04-e8060543a19c" data-linktype="relative-path">subscription</a></span>
verifications on the <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_434b0234-e970-4e8c-bdfa-e16a30d96703" data-linktype="relative-path">server</a></span> by the <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_60e0e1fa-66fe-41e1-b5e3-ceab97e53506" data-linktype="relative-path">client</a></span>.
IEventSystem2 inherits opnums 0 through 12 from the <span><a href="e33e278a-55c3-4535-9704-df4d67096aae" data-linktype="relative-path">IEventSystem</a></span>
interface, as specified in section 3.1.4.1. The version for this interface is
0.0.</p><p>The server SHOULD support this interface.<a id="Appendix_A_Target_15"></a><a aria-label="Product behavior note 15" href="aa52a2bf-fd29-47f9-8dea-d887d6b7d5ee#Appendix_A_15" data-linktype="relative-path">&lt;15&gt;</a> To receive incoming remote
calls for this interface, the server MUST implement a DCOM <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_a224e395-3fea-48bd-b141-3dd9bee2136a" data-linktype="relative-path">object
class</a></span> with the <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_e433c806-6cb6-46a2-bb95-523df8818c99" data-linktype="relative-path">CLSID</a></span>
CLSID_EventSystem (see section <span><a href="25e89236-b0b3-4d8b-b1fb-64e0e9f0e156" data-linktype="relative-path">1.9</a></span>) using the <span><a href="e74594a9-404c-4729-91f4-3fe4453cdf4d#gt_c4813fc3-b2e5-4aa3-bde7-421d950d68d3" data-linktype="relative-path">UUID</a></span>
{99CC098F-A48A-4e9c-8E58-965C0AFC19D5}for this interface.</p><p>The interface contains the following methods beyond those of
IEventSystem.</p><p>Methods in RPC Opnum Order</p><table><thead>
  <tr>
   <th>
   <p>Method</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>GetVersion</td>
  <td>Gets the version of the event system implementation. Opnum: 13</td>
 </tr><tr>
  <td>VerifyTransientSubscribers</td>
  <td>Verifies the state of the transient subscribers. Opnum: 14</td>
 </tr></tbody></table><p> </p></div>