L_WiaGetSelectedDeviceType

#include "ltwia.h"

L_LTWIA_API L_INT EXT_FUNCTION L_WiaGetSelectedDeviceType(hSession, puDeviceType)

Gets the currently selected device type.

Parameters

HWIASESSION hSession

Handle to an existing WIA session. This handle is obtained by calling the L_WiaInitSession function.

L_UINT32 * puDeviceType

The type if the currently selected device. 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 version 16 or higher.

Call this function to determine the currently selected device type.

WIA does not have a default device selection. In order for this function to succeed be sure to call either L_WiaSelectDeviceDlg or L_WiaSelectDevice before calling this function.

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.

Platforms

LEADTOOLS WIA supports both 32-bit and 64-bit image acquisition for both WIA 1.0 (XP and earlier) and WIA 2.0 (VISTA and later).