This capability queries the Source for UI support for preview mode. If true, the Source supports preview UI. CAP_CAMERAPREVIEWUI

Allows the application to query the data source to see if it supports the new operation triplets. CAP_CUSTOMDSDATA

Uniquely identifies an interface for a Data Source, so that an Application can properly interpret its custom content. This is a read only capability. CAP_CUSTOMINTERFACEGUID

Allows an application to query a source to see if it implements the new user interface settings dialog. CAP_ENABLEDSUIONLY

If true, the Source displays a progress indicator during acquisition and transfer, regardless of whether the Source's user interface is active. If FALSE, the progress indicator is suppressed if the Source's user interface is inactive. The Source displays device-specific instructions and error messages if either the user interface or progress indicator is turned on.In this case it returns TWCC_OPERATIONERROR to alert the application that it handled the error, and communicated the problem to the user. If both the user interface and progress indicator are turned off, then the Source never displays any message to the user, even if TWCC_OPERATIONERROR is returned.Messages to the user are under the sole control of the Application. CAP_INDICATORS

Specify what messages can be displayed if Indicators is TRUE. CAP_INDICATORSMODE

If true, indicates that this Source supports acquisition with/without the UI. CAP_UICONTROLLABLE