<div class="content"><p>The PHONE_BUTTON packet is sent to notify the application
that it has detected a button press on the local phone.</p><table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">TotalSize</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">InitContext</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">fnPostProcessProcHandle</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">hRemotePhone</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">Msg</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">OpenContext</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">Param1</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">Param2</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">Param3</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p align="center">Param4</p>
  </td>
 </tr>
</tbody></table><p><b>TotalSize (4 bytes): </b>An unsigned 32-bit
integer. The total size of the asynchronous event packet.</p><p><b>InitContext (4 bytes): </b>An unsigned 32-bit
integer. The opaque, client-specified session value that MUST be equal to the
InitContext value that is specified in the original scoping of the phone <a href="a600d262-0bb1-447b-8a0d-6f57d3a8ec18" data-linktype="relative-path">Initialize</a> request.</p><p><b>fnPostProcessProcHandle (4 bytes): </b>An unsigned
32-bit integer. MUST be set to zero when sent and MUST be ignored on receipt. </p><p><b>hRemotePhone (4 bytes): </b>An unsigned 32-bit
integer. The handle of the <a href="489de77f-16d8-4c4f-939a-f795e8b42893#gt_60e0e1fa-66fe-41e1-b5e3-ceab97e53506" data-linktype="relative-path">client</a>
for the phone value. </p><p><b>Msg (4 bytes): </b>An unsigned 32-bit integer. The
packet type; MUST be set to 0x0000000E (PHONE_BUTTON).</p><p><b>OpenContext (4 bytes): </b>An unsigned 32-bit
integer. The opaque, client-specified context value that MUST be equal to the
OpenContext value that is specified in the original scoping of the phone <a href="6b5ee45e-b5c8-4148-a9b2-b16b9b995c3f" data-linktype="relative-path">Open</a> request.</p><dl>
<dd>
<p>This information MUST be passed back to the
application with each completion and event that is associated with the handle
of the phone. This field is not interpreted by TAPI.</p>
</dd></dl><p><b>Param1 (4 bytes): </b>An unsigned 32-bit integer.
The button or lamp identifier of the button that was pressed. </p><p><b>Param2 (4 bytes): </b>An unsigned 32-bit integer.
The mode of the button. This parameter MUST use one of the <a href="2ef4c77a-2f8c-4c49-ba42-b2abdc0c94d8" data-linktype="relative-path">PHONEBUTTONMODE_Constants</a>.</p><p><b>Param3 (4 bytes): </b>An unsigned 32-bit integer.
Specifies whether this is a button-down event or a button-up event. This
parameter MUST use one of the <a href="c6a02723-4222-4a5e-b0f5-0401edcb1022" data-linktype="relative-path">PHONEBUTTONSTATE_Constants</a>.
</p><p><b>Param4 (4 bytes): </b>An unsigned 32-bit integer.
This MUST be ignored on receipt and can be any value.  </p></div>