<div class="content"><p>The ICatalog64BitSupport <a href="3f01a312-3391-4109-a96e-95358babf191#gt_95913fbd-3262-47ae-b5eb-18e6806824b9" data-linktype="relative-path">interface</a> provides methods
for capability negotiation for the multiple-bitness capability, as specified in
section <a href="bb9c1f3a-5ff3-40a4-bec5-8ff28007ce2d" data-linktype="relative-path">3.1.4.4</a>, and
the 64-bit <a href="0f823212-7c71-4f6a-91b7-fb709d827b97" data-linktype="relative-path">QueryCell</a>
marshaling format capability, as specified in section <a href="628ebe08-d6a1-43b1-9d61-8515a23b54c2" data-linktype="relative-path">3.1.4.2</a>. This interface
inherits from <a href="../ms-dcom/2b4db106-fb79-4a67-b45f-63654f19c54c" data-linktype="relative-path">IUnknown</a>,
as specified in <a href="../ms-dcom/4a893f3d-bd29-48cd-9f43-d9777a4415b0" data-linktype="relative-path">[MS-DCOM]</a>
section 3.1.1.5.8.</p><p>To receive incoming remote calls for this interface, the
server MUST implement a DCOM Object Class with the <a href="3f01a312-3391-4109-a96e-95358babf191#gt_e433c806-6cb6-46a2-bb95-523df8818c99" data-linktype="relative-path">CLSID</a> CLSID_COMAServer, as
specified in section <a href="3afd05f6-01a3-4920-951f-f9c703a3b0f1" data-linktype="relative-path">1.9</a>,
using the <a href="3f01a312-3391-4109-a96e-95358babf191#gt_c4813fc3-b2e5-4aa3-bde7-421d950d68d3" data-linktype="relative-path">UUID</a>
{1D118904-94B3-4A64-9FA6-ED432666A7B9} for this interface.</p><p>This interface includes the following methods beyond those
of IUnknown.</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>
  <p><a href="b1bfa294-089b-4276-a3dd-bebaf2faba9d" data-linktype="relative-path">SupportsMultipleBitness</a></p>
  </td>
  <td>
  <p>Performs capability negotiation for the
  multiple-bitness capability.</p>
  <p>Opnum: 3</p>
  </td>
 </tr><tr>
  <td>
  <p><a href="f6155ebf-6268-47d2-84c1-8bcf8daa9872" data-linktype="relative-path">Initialize64BitQueryCellSupport</a></p>
  </td>
  <td>
  <p>Performs capability negotiation for the 64-bit
  QueryCell marshaling format capability.</p>
  <p>Opnum: 4</p>
  </td>
 </tr></tbody></table><p>All methods MUST NOT throw exceptions.</p></div>