Enables or disables preview mode, which enables the application to overwrite the initial buffering logic.
PROPVARIANT type (vt)
The constant MFNETSOURCE_PREVIEWMODEENABLED defines the GUID for the property key. The property identifier (PID) is zero. This property is set on the network source by passing an IPropertyStore pointer to the source resolver. For more information, see Configuring a Media Source.
|Minimum supported client
||Windows 7 [desktop apps only]
|Minimum supported server
||Windows Server 2008 R2 [desktop apps only]