DTWAIN_GetDeviceEvent

The DTWAIN_GetDeviceEvent function gets the last device event that the Source Source has detected. The lpDeviceValues address points to a LONG that will be filled in with the last device event that occurred. The DTWAIN_GetDeviceEvent function is usually called when the DTWAIN_TN_DEVICEEVENT notification is sent to the application window.

Value	Meaning
DTWAIN_DE_CHKAUTOCAPTURE	The automatic capture settings on the device have been changed.
DTWAIN_DE_CHKBATTERY	Status of the battery has changed.
DTWAIN_DE_CHKDEVICEONLINE	The device may have been powered off.
DTWAIN_DE_CHKFLASH	The flash setting has changed.
DTWAIN_DE_CHKPOWERSUPPLY	The power supply has changed.
DTWAIN_DE_CHKRESOLUTION	The resolution of the device has changed.
DTWAIN_DE_DEVICEADDED	A device has been added to the Source.
DTWAIN_DE_DEVICEOFFLINE	The device has become unavailable. The device is assumed to be connected.
DTWAIN_DE_DEVICEREADY	A device is ready to capture another image.
DTWAIN_DE_DEVICEREMOVED	A device has been removed from the Source.
DTWAIN_DE_DEVICEOFFLINE	The device is off-line.
DTWAIN_DE_PAPERDOUBLEFEED	Report a double feed to the application.
DTWAIN_DE_PAPERJAM	Report a paper jam to the application.

Depending on the event that occurred, extra information can be retrieved concerning the event. The DTWAIN_GetDeviceEventEx function will return any extra device event information with respect to the last event that occurred.