LWia::GetSelectedDeviceType

#include "ltwrappr.h"

virtual L_INT LWia::GetSelectedDeviceType(puDeviceType)

Gets the currently selected device type.

Parameters

L_UINT32 * puDeviceType

The type of the device that is currently connected. Possible values are:

Value	Meaning
WiaDeviceTypeScanner	The device is a scanner.
WiaDeviceTypeDigitalCamera	The device is a camera. Cameras are not supported by Windows Vista and later.
WiaDeviceTypeStreamingVideo	The device contains streaming video. Streaming video is not supported by Windows Server 2003, Windows Vista, or later.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This feature is available in LEADTOOLS version 16 or higher.

Call [LWia:GetSelectedDeviceType to determine which device type is currently selected.

WIA does not have a default device selection. In order for [LWia:GetSelectedDeviceType to succeed, be sure to call either LWia::SelectDeviceDlg or LWia::SelectDevice before calling [LWia:GetSelectedDeviceType.

LWia::AcquireSimple Exception

When using LWia::AcquireSimple for automatic acquisition, it is not necessary to call either of the two functions mentioned above before calling [LWia:GetSelectedDeviceType. LWia::AcquireSimple calls LWia::SelectDeviceDlg internally, ensuring a device is currently selected.

Required DLLs and Libraries

• LTWIA
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.