TIETwainParams.DeviceOnline
Declaration
property DeviceOnline: boolean;
Description
Returns true if the physical hardware (e.g. scanner, digital camera, image database, etc.) that represents the image source is attached, powered on, and communicating.
Warning!! Many (almost all) devices still return "true" when they are off or disconnected.
Twain Property: CAP_DEVICEONLINE
Note: Use
IsCapabilitySupported to determine if this capability is supported by the current scanner