<div class="content"><p>A client calls this method to obtain tracking information
for <a href="e6e3f493-e460-4df6-95a1-74ff12ea822d#gt_71669ed9-7eaf-4328-9e2e-4d3430f0f9bf" data-linktype="relative-path">components</a> that have
one or more <a href="e6e3f493-e460-4df6-95a1-74ff12ea822d#gt_712af290-acfd-4e3a-a768-0530caa93b18" data-linktype="relative-path">component
instances</a> in a given <a href="e6e3f493-e460-4df6-95a1-74ff12ea822d#gt_791190e6-1e02-42cb-bd25-5aee3ab516ed" data-linktype="relative-path">instance
container</a>.</p><dl>
<dd>
<div><pre> HRESULT GetComponentDataByContainer(
   [in] DWORD idContainer,
   [out] DWORD* nComponents,
   [out, size_is(,*nComponents)] ComponentData** aComponentData
 );
</pre></div>
</dd></dl><p><b>idContainer:</b> The <a href="e6e3f493-e460-4df6-95a1-74ff12ea822d#gt_89558104-aaa5-4aad-a89c-1b8febc6b7e4" data-linktype="relative-path">container legacy identifier</a>
of an instance container.</p><p><b>nComponents: </b>A pointer to a variable that,
upon successful completion, MUST contain the number of elements in <i>aComponentData</i>.</p><p><b>aComponentData: </b>A pointer to a variable that,
upon successful completion, MUST contain an array of zero or more <a href="e5f5dc8e-d308-43b6-8b32-073d3ea099cd" data-linktype="relative-path">ComponentData (section 2.2.4)</a>
structures. An array with zero elements MUST be represented by null.</p><p><b>Return Values: </b>This method MUST return S_OK
(0x00000000) on success and a failure result (as specified in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>
section <a href="../ms-erref/0642cb2f-2075-4469-918c-4441e69c548a" data-linktype="relative-path">2.1</a>)
on failure.</p><p>When this method is invoked, the server MUST verify that the
<i>idContainer</i> parameter identifies a tracked instance container and fail
the call if not. The server then MUST attempt to return an array of zero or more
ComponentData structures, one for each distinct component instance instantiated
in the instance container, and fail the call if it cannot.</p></div>