[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
CoInitializeHelper method calls the CoInitializeEx function at the start of the thread.
static HRESULT CoInitializeHelper();
This method has no parameters.
Returns an HRESULT value. The following are possible values.
||The CoInitializeEx function is not available.
The CAMThread::InitialThreadProc method calls this helper method, which calls the CoInitializeEx function. It uses the COINIT_DISABLE_OLE1DDE flag, to disable Dynamic Data Exchange (DDE). For more information, see the Platform SDK.